Skocz do pozycji: 1.

Tytuł:

Quintet-gated FEA to form crossover beam

Autorzy:

Tagami, T.
Takeda, M.
Horie, S.
Yoshida, T.
Nagao, M.
Neo, Y.
Aoki, T.
Mimura, H.
Kanemaru, S.

Powiązania:

https://bibliotekanauki.pl/articles/385271.pdf

Data publikacji:

2009

Wydawca:

Sieć Badawcza Łukasiewicz - Przemysłowy Instytut Automatyki i Pomiarów

Tematy:

FEA
beam

Opis:

In this report, we have described about new field emission array (FEA) structure built-in micro-column. This newly proposed FEA has multi-gated structured and is designed to form a crossover. We had already demonstrated the quad- and quintet- gated FEA. A crossover formation by was successfully observed for the first time. by the quintetgated FEA Furthermore electron beam lithography was demonstrated.

Źródło:

Journal of Automation Mobile Robotics and Intelligent Systems; 2009, 3, 4; 157-158
1897-8649
2080-2145

Pojawia się w:

Journal of Automation Mobile Robotics and Intelligent Systems

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 2.

Tytuł:

The Design and Structural Analysis of the Endoprosthesis of the Hip Joint

Autorzy:

Karpiński, R.
Jaworski, Ł.
Szabelski, J.

Powiązania:

https://bibliotekanauki.pl/articles/117650.pdf

Data publikacji:

2016

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

hip
endoprosthesis
FEA

Opis:

The paper presents results of the preliminary structural analysis of model of the endoprosthesis of the hip joint. Basics of anatomy and biomechanical analysis of the hip joint were introduced. Based on data from atlas of human anatomy and medical imaging, the prototype of endoprosthesis was modelled using Solid Edge ST8 software. After determining physical properties of structural materials, the Finite Elements Analysis of the model was conducted using in SolidWorks software under various load conditions. Finally the results of analysis are presented.

Źródło:

Applied Computer Science; 2016, 12, 1; 87-95
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 3.

Tytuł:

The Analysis of the Influence of Riveting Parameters Specified in Selected Riveting Instructions on Residual Stresses

Autorzy:

Wronicz, W.
Kaniowski, J.

Powiązania:

https://bibliotekanauki.pl/articles/97979.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

riveting
residual stress
FEA
simulation

Opis:

The riveting parameters strongly affect residual stresses induced during riveting, which in turn have an impact on the fatigue life of riveted joints. Since rivets are established as critical from the fatigue point of view, the fatigue life of riveted joints often determines the life of the whole structure. The authors were able to become acquainted with three riveting instructions (process specifications) used by the aerospace companies from western Europe. This work presents the analysis of the riveting parameters' influence on residual stresses around the rivets. The impact of the clearance between a rivet shank and a hole as well as driven head dimensions and a rivet length were investigated based on the numerical simulations. The aim of the analysis was to determine the range of stresses variation when the requirements of the riveting instructions are fulfilled. For the purposes of comparison, the calculations were performed also with the parameters as specified in the Polish industry standards. For all calculations, the geometry of the universal rivet MS20470 was used. The results show that residual stresses can vary strongly depending on the parameters in the instructions and standard requirements.

Źródło:

Fatigue of Aircraft Structures; 2014, 6; 63-71
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 4.

Tytuł:

Testing virtual prototype of a new product in two simulation environments

Autorzy:

Łukaszewicz, Krzysztof

Powiązania:

https://bibliotekanauki.pl/articles/407282.pdf

Data publikacji:

2019

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

CAD
FEA
dynamic simulation
virtual prototyping

Opis:

This paper is a case study conducted to present an approach to the process of designing new products using virtual prototyping. During the first stage of research a digital geometric model of the vehicle was created. Secondly it underwent a series of tests utilising the multibody system method in order to determine the forces and displacements in selected construction nodes of the vehicle during its movement on an uneven surface. In consequence the most dangerous case of loads was identified. The obtained results were used to conduct detailed strength testing of the bicycle frame and changes its geometry. For the purposes of this case study two FEA software environments (Inventor and SolidWorks) were used. It has been confirmed that using method allows to implement the process of creating a new product more effectively as well as to assess the influence of the conditions of its usage more efficiently. It was stated that using of different software environments increases the complexity of the technical process of production preparation but at the same time increases the certainty of prototype testing. The presented example of simulation calculations made for the bicycle can be considered as a useful method for calculating other prototypes with high complexity of construction due to its systematized character of chosen conditions and testing procedure. It allows to verify the correctness of construction, functionality and perform many analyses, which can contribute to the elimination of possible errors as early as at the construction stage.

Źródło:

Management and Production Engineering Review; 2019, 10, 3; 124--135
2080-8208
2082-1344

Pojawia się w:

Management and Production Engineering Review

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 5.

Tytuł:

Finite Element Method analysis of the deformation of the shaft and supports of a large, precise lathe – Cutting force excitation

Autorzy:

Dounar, Stanislau
Iakimovitch, Alexandre
Jakubowski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/135653.pdf

Data publikacji:

2020

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

FEA
lathe
rotor
centerline
excitation
resonance

Opis:

In this paper, Finite Element Method (FEA) harmonic analysis of the changes caused by raising the centerline of a large, precise lathe is presented. Two standalone dynamic subsystems (“Rotor Shaft” and “Support”) are revealed and the resilience of the “Rotor Shaft” to the raising procedure is stated. The three subsystems of the “Support” class are much more dynamically pliable, only the main eigenmodes of the shaft and supports are excited in the 0…100 Hz range (MR1“Half-wave” and MS1…3 “Radial pecking”). Mounting the lunette suppresses the MR1 peak by a factor of two; therefore the lunette is strongly recommended, with an optional tuned-mass damper (TMD). The support’s resonant frequencies MS1…3 are more deleterious for precision; they should be omitted or weakened using TMD’s that are attached to the supports. For the above conditions, raising the centerline (up to 600 mm) may be included in the lathe renovation program.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2020, 62 (134); 91-98
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 6.

Tytuł:

About mechanical joints design in metal - composite structure

Autorzy:

Puchała, K.
Szymczyk, E.
Jachimowicz, J.

Powiązania:

https://bibliotekanauki.pl/articles/246795.pdf

Data publikacji:

2012

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

mechanical joint
adhesive joint
FEA
aviation

Opis:

Riveting is still one of the main joining methods of thin-walled aircraft structures. Such features as simplicity of implementation, possibility of two different material connection (e.g. metallic with non-metallic ones) and the fact that is it a well-known (reliable) method causes popularity of riveting. The never-ending attempt to obtain as low mass as possible (mainly to reduce fuel consumption) is the reason for using material of high specific strength in the aerospace industry. High strength titanium or aluminium alloys (e.g. 2024T3) and composite laminates (e.g. CFRP or Glare) are examples of such materials. The article deals with methods of connecting various materials. The paper presents advantages and disadvantages of different/selected connection types. Strength prediction and failure modes of mechanical joints are described for metallic as well as for composite components. Composites are complex materials having an anisotropic structure (and anisotropic mechanical properties) leading to various failure mechanisms. Main principles for appropriate joint design of composite laminate panels (laminate configuration and typical/specific geometrical dimensions) are indicated/specified. The bearing failure mechanism is accepted to be a safe progressive one. Mechanism of bearing (generally compressive) load transfer into composite laminates by shear of the matrix is analysed. Some examples of improvement bearing strength of laminates are presented according to literature. On the base of presented examples and bearing load transfer analysis, some conclusions for an appropriate solution of this problem are drawn.

Źródło:

Journal of KONES; 2012, 19, 3; 381-390
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 7.

Tytuł:

Numerical Analysis of Spinal Loads in Spondylolisthesis Treatment using Pedicle Screws – Preliminary Research

Autorzy:

Zubrzycki, J.
Smidova, N.
Litak, J.
Ausiyevich, A.

Powiązania:

https://bibliotekanauki.pl/articles/117950.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

pedicle screws
FEA
CAD
3D modeling

Opis:

The aim of this experimental study was to analyse the influence of lumbar stabilisation used in the treatment of spondylolisthesis on the biomechanical properties of the human lumbar spine. FEM models were built on the basis of pre-surgical CT scans, routinely used in medical practice. MIMICS software was used to process the results of the neuroimaging study and to create 3D models. Two models were built: with and without a stabiliser. A static load analysis was performed for a normal upper-body load. The simulations allowed to determine the stresses in the individual discs for both models, with and without the transpedicular stabiliser.

Źródło:

Applied Computer Science; 2017, 13, 3; 64-76
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 8.

Tytuł:

Finite element analysis of the percutaneous coronary intervention in a coronary bifurcation

Autorzy:

Bukała, J. K.
Małachowski, J.
Kwiatkowski, P.

Powiązania:

https://bibliotekanauki.pl/articles/307501.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

angioplastyka
FEA
symulacja
angioplasty
balloon
kissing
simulation

Opis:

Purpose: The paper presents the process of numerical modeling and simulation of balloon angioplasty of the coronary artery using Finite Element Method. Methods: The authors focused on the issue of adequate pressure applying in an arterial tissue during the post-dilatation process in the 'kissing balloon' stenting technique applied to patients with bifurcation stenosis. Despite great progress in the field of interventional cardiology, angioplasty in bifurcations still belongs to the most difficult interventions, generally being less effective and more risky than in the cases of straight stenosis.Results: During the modeling procedures and further simulations, the authors focused on mutual cooperation of non - compliant angioplasty balloons and the coronary artery. The other goal was to develop a sufficiently accurate model of the coronary artery fragment, including its bifurcation and angioplasty balloons, however it was decided to ignore the modeling of coronary stents.Conclusions: The undertaken issue is considered as relatively complicated and complex but, in the authors opinion, the implementation of advanced computer aided engineering techniques may, in this case, answer several important questions without the need of performing costly and aggravating in vivo tests.

Źródło:

Acta of Bioengineering and Biomechanics; 2014, 16, 4; 23-31
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 9.

Tytuł:

Deep drawing with macro structured for an environmentally friendly process

Autorzy:

Brosius, Alexander
Mousavi, Ali

Powiązania:

https://bibliotekanauki.pl/articles/99622.pdf

Data publikacji:

2020

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

deep drawing
energy saving
environmental issue
FEA

Opis:

The efficient use of resources are becoming more important due to economic and environmental requirements. In widely used forming processes like deep drawing an avoidance of lubricants – namely dry deep drawing – is a key factor for saving resources. In this paper, a combined approach consisting of a macro-structured tool design and a special modified protective coating is presented. The combination ensures a stable process with a sufficiently wide process window under dry conditions. The absence of lubricants in critical areas has to be compensated by tetrahedral amorphous carbon ta-C films which is additionally structured by Direct Laser Interference Patterning (DLIP) for further improvement of the tribological performance.

Źródło:

Journal of Machine Engineering; 2020, 20, 1; 34-42
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 10.

Tytuł:

The Influence of Geometrical Parameters in Socket - Pin Connections on the Value of Opening Force
Wpływ parametrów geometrycznych w połączeniach typu gniazdo - trzpień na wartość siły otwierającej

Autorzy:

Sadowski, T.
Golewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/356243.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

socket-pin joints
deformation process
FEA (finite element analysis)
połączenie gniazdo-trzpień
proces deformacji
FEA
analiza elementów skończonych

Opis:

The paper presents an analysis of the influence of a number of technological aspects of both the socket and the pin on the value of the force required for joint disconnection. A number of numerical simulations were made in Abaqus program to examine effects of such parameters as: presence of an interference fit, use of spherical latches, application of different rigidity of the pin by making cuts with variable width and length, use of different angles of inclination of the working part of the connection. Models of different simple joints presented in this work, can also operate in large structures forming panels of aircraft structures. For this purpose one of the analyzed geometry of the connection was applied to create a 3-D panel model of the structural element in CAD - SolidWorks program. All analysed models with different geometries were subjected to simulation of opening process. The corresponding critical forces were estimated for the beginning of the failure process. The detailed discussion of all model parameters was included to specify their influence on the whole disconnection of joints. It should be noted that aerospace structures work under complex loading states and further numerical studies are required to extend the presented results.
W pracy przedstawiono analizę wpływu kilku zagadnień technologii wykonania zarówno gniazda jak i trzpienia na wartość siły potrzebnej do rozłączenia połączenia. Przeprowadzono szereg symulacji numerycznych w programie Abaqus, badając wpływ takich parametrów jak: występowanie wcisku, użycie sferycznych zatrzasków, zastosowanie różnych sztywności w trzpieniu poprzez wykonanie rozcięć o zmiennej szerokości i długości, zastosowanie różnych kątów pochylenia części roboczej gniazda. Prezentowane w pracy modele pojedynczych połączeń mogą także funkcjonować w większych strukturach tworzących panele konstrukcji lotniczych. W tym celu, dla jednego z analizowanych rozwiązań geometrii wykonano model CAD panelu w programie SolidWorks, który następnie poddano symulacji otwierania. Należy jednak zwrócić uwagę, że konstrukcje lotnicze pracują w złożonych stanach naprężeń i tym samym konieczne są dalsze badania numeryczne prezentowanych rozwiązań.

Źródło:

Archives of Metallurgy and Materials; 2015, 60, 4; 2743-2750
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 11.

Tytuł:

Contact Stress Simulation for Mg-0.5Ca-xMn Alloys used for Medical Application

Autorzy:

Nastasa, Roxana Oana
Tufescu, Ana
Munteanu, Corneliu
Istrate, Bogdan
Przybył, Anna
Ianus, Gelu

Powiązania:

https://bibliotekanauki.pl/articles/2106578.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

Mg-Ca-Mn alloys
FEA analysis
mechanical properties

Opis:

In the past decades, Mg alloys have been studied intensively as potential orthopedic applications. The present research work, the FEA of the obtained contact stresses in the case of the load applied on Mg-0.5Ca-xMn alloys has been investigated. It has been used the NCB Curved Femur Shaft Plate type as a model in order to establish the necessary modeling parameters. The objective of the present work was to highlight the strain values at the contact point on the surface of the Mg-0.5Ca-xMn alloys. The results showed that the highest stresses observed near the gaps of the plate and in the screws. It means that all mechanical loads are sustained by the plate and screws, and the patient’s femur can be recovered.

Źródło:

Archives of Metallurgy and Materials; 2022, 67, 2; 405--408
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 12.

Tytuł:

Finite element analysis of the dynamically created portal in the huge machine tool of “travelling column” type

Autorzy:

Dounar, Stanislau
Iakimovitch, Alexandre
Jakubowski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/1818876.pdf

Data publikacji:

2021

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

FEA
portal
travelling column
rigidity
resonance
torsion
pecking

Opis:

In this paper, a special configuration for the huge multipurpose machine tool of “travelling column” type was investigated by the finite element analysis. Internal degrees of freedom of a bulky system consisting of the ram, stock, column, sledge and bed, were implemented by the hydrostatic guides. A simulation of coupling two assembled columns into the portal structure was completed. The results of this work showed that temporal joining raises the spindle static rigidity by 1.39–1.91 times depending on the direction (mostly longitudinal – along the X-axis). The simulation also revealed the robustness of a whole-machine resonance pattern (11.7–39.0 Hz) to “column–to–portal coupling”. Eight types of eigenmodes were analyzed for frequency intervals from 0 to 80 Hz. A decrease by 2.9 times of the resonance peaks of a frequency response function was observed in the case of a portal structure creation. In case of columns-to-portal transition, stable cutting just at resonance frequencies (resonance overriding) becomes allowable. Overall, the “Portal” structure is recommended for intermittent cutting machining by raised high spindle unit at frequencies below 40 Hz.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 65 (137); 29-37
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 13.

Tytuł:

Automotive stabilizer bars - strength calculations of stabilizer bars using finite element method - directions and general instructions for calculation
Stabilizatory samochodowe – obliczenia wytrzymałościowe stabilizatorów z wykorzystaniem metody elementów skończonych – wskazówki i ogólne wytyczne obliczeniowe

Autorzy:

Wittek, A. M.
Gąska, D.
Matyja, T.

Powiązania:

https://bibliotekanauki.pl/articles/1364145.pdf

Data publikacji:

2014

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

stabilizer bar
FEA calculations
stabilizatory samochodowe
obliczenia MES

Opis:

The function of stabilizer bars in motor vehicles is to reduce the body roll during cornering. The body roll is influenced by the occurring wheel load shift and the change of camber angle. Decisive is the steering performance which may be purposefully adjusted towards understeer or oversteer when designing the stabilization. The article contains the further outline of the calculation methods for stabilizer bars. Modern technological and structural solutions in contemporary cars are reflected also in the construction and manufacture of stabilizer bars. A proper construction and the selection of parameters influence the strength properties, the weight, durability and reliability as well as the selection of an appropriate production method. An improper preparation of Finite Element Method calculation models consequently leads to wrong results. It is particularly difficult to interpret the results and to find an error if we do not have a comparative calculation base (such as results of fatigue tests, analytical strength calculations). The article contains practical directions and general instructions for calculation necessary for a correct preparation of calculation models, for a proper performance of calculations and a proper interpretation of results using Finite Element Method.
Stabilizatory w pojazdach samochodowych mają za zadanie redukcję przechyłów poprzecznych podczas jazdy na zakręcie lub pod działaniem innych sił bocznych. Na przechyły boczne zasadniczy wpływ ma przemieszczenie się obciążeń kół jezdnych, jak i zmiany kąta pochylenia kół. Te czynniki mają zasadniczy wpływ na kierowalność pojazdu, która poprzez odpowiedni dobór stabilitzatorów objawia się jako tendecja do podsterowności lub nadsterowności. Artykuł przedstawia zarys podstaw metod obliczeniowych stosowanych w procesie konstrukcji stabilizatorów. Nowoczesne rozwiązania technologiczne i konstrukcyjne we współczesnych pojazdach samochodowych są również widoczne w konstrukcji i produkcji stabilizatorów. Prawidłowa konstrukcja i właściwy dobór parametrów stabilizatora wpływa na jego cechy wytrzymałościowe, ciężar, trwałość i niezawodność, a także na dobór odpowiednich metod produkcyjnych. Niewłaściwe przygotowanie modeli obliczeniowych z wykorzystaniem Metody Elementów Skończonych prowadzi w konsekwencji do błędnych wyników. Szczególnie trudna jest interpretacja wyników i znalezienie błędu, jeśli nie dysponujemy danymi porównawczymi (takimi jak wyniki testów zmęczeniowych lub wynikami analitycznych obliczeń wytrzymałościowych). Artykuł zawiera wskazówki praktyczne i ogólne wytyczne obliczeniowe niezbędne do prawidłowego przygotowania modeli obliczeniowych, do właściwego przeprowadzenia obliczeń i właściwej interpretacji wyników z wykorzystaniem Metody Elementów Skończonych.

Źródło:

Archiwum Motoryzacji; 2014, 65, 3; 37-50
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 14.

Tytuł:

Application of Strain Gauges in Measurements of Strain Distribution in Complex Objects

Autorzy:

Tutak, P.

Powiązania:

https://bibliotekanauki.pl/articles/108730.pdf

Data publikacji:

2014

Wydawca:

Społeczna Akademia Nauk w Łodzi

Tematy:

strain gauge
FEA
charge air cooler
thermal cycle

Opis:

This article presents an application of strain gauges in measurements of strain which occurs in charge air cooler during the thermal cycle test. The work shows the main idea of measuring system based on strain gauges and important aspects that should be considered when performing measurement. In this article there has been also presented construction and principle operation of a strain gauge measurement system.

Źródło:

Journal of Applied Computer Science Methods; 2014, 6 No. 2; 135-145
1689-9636

Pojawia się w:

Journal of Applied Computer Science Methods

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 15.

Tytuł:

Hybrid adhesive bonded and riveted joints - influence of rivet geometrical layout on strength of joints
Połączenia hybrydowe klejowo-nitowe - wpływ geometrii rozmieszczenia nitów na wytrzymałość połączeń

Autorzy:

Sadowski, T.
Zarzeka-Raczkowska, E.

Powiązania:

https://bibliotekanauki.pl/articles/356163.pdf

Data publikacji:

2012

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

hybrid joint
adhesive joint
rivet joint
damage
FEA

Opis:

The hybrid adhesive bonded and riveted joints have wider and wider application in different branches of engineering: aerospace, mechanical, civil etc. The hybrid joints' strength is 1.5 to 3 times higher than only adhesive bonded joints' strength. The hybrid joints characterize higher reliability during long-term working. In this article we present the influence of rivets' lay-out geometry on the hybrid adhesive bonded/riveted joints response to mechanical loading. Experimental research was carried using 3-D digital image correlation system ARAMIS. This system enables monitoring of the deformation processes of the hybrid joint specimen up to failure. We analysed the state of deformation of the adhesive bonded double-lap joints reinforced by different numbers of rivets. The hybrid joint specimens were subjected to the uniaxial tensile test. Moreover, the influence of geometry of individual number of rivets' layout (rivets arranged in one or more rows) for hybrid joint strength was studied. Experimental research was completed and supported by the computer simulations of the whole deformation processes of metal layers (aluminum), adhesive layers and rivets. Numerical simulations were conducted with the ABAQUS programme. The analysis of stress concentrations in different parts of the hybrid joint and their behaviour up to failure were investigated. Finally, the analysis and the comparison of the obtained results confirmed the influence of rivets' lay-out geometry not only on rivets joints but also on the hybrid adhesive bonded/riveted joints.
Połączenia hybrydowe klejowo-nitowe znajdują coraz szersze zastosowania w różnych dziedzinach inżynieryjnych: mechanice, lotnictwie, inżynierii lądowej i innych. Maja one 1,5 - 3 razy większą wytrzymałość niż wytrzymałość połączeń wyłącznie klejowych oraz charakteryzują się większą niezawodnością w długotrwałej eksploatacji. W niniejszym artykule przedstawiono wpływ geometrii rozmieszczenia nitów na wytrzymałość połączeń hybrydowych klejowo-nitowych poddanych jednoosiowemu rozciąganiu. Badania eksperymentalne zostały przeprowadzone z zastosowaniem systemu monitoringu procesu deformacji ARAMIS, który pozwala na śledzenie tego procesu aż do momentu zniszczenia próbki. Wyznaczono stany deformacji w połączeniach klejowych dwunakładowych wzmocnionych różną ilością nitów poddanych jednoosiowemu rozciąganiu. Ponadto badano wpływ geometrii rozmieszczenia poszczególnej liczby nitów (szwy jedno- i wielorzędowe) na wytrzymałość połączenia hybrydowego. Badania eksperymentalne zostały uzupełnione i potwierdzone symulacja komputerowa zachodzących procesów zniszczenia w warstwach blach, kleju oraz nitach. Symulacje komputerowe przeprowadzono w programie ABAQUS. Analiza i porównanie otrzymanych wyników potwierdzają wpływ geometrii rozmieszczenia nitów na wytrzymałość nie tylko połączeń nitowych, ale również połączeń typu hybrydowego.

Źródło:

Archives of Metallurgy and Materials; 2012, 57, 4; 1128-1135
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 16.

Tytuł:

Multiaxial force platform with disturbance compensation for machine tools

Autorzy:

Palalic, Marijana
Möhring, Hans-Christian
Maier, Walther
de Mendoza, Adrian Gonzalez
Riemeier, Friedrich

Powiązania:

https://bibliotekanauki.pl/articles/99882.pdf

Data publikacji:

2020

Wydawca:

Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych

Tematy:

force determination platform
disturbance-resistant
FEA
multibody system

Opis:

As part of a cooperation project between the Institute for Machine Tools, Stuttgart, Germany, and EMO Systems/Nuton GmbH, Berlin, Germany, a prototype of a multiaxial force platform with disturbance compensation for the measurement of the cutting forces in machine tools was developed. Commercially available products based on piezoelectric technology are subject to a degree of measurement uncertainty and therefore characterized by various disturbances. Interpreting measurement data of the commercially available products is complex, time-consuming and prone to errors. This paper describes the mechanical design and the simulation of the multiaxial force measuring system with the finite element method (FEM) as well as the conceptual development of a reduced model for a multibody simulation with the purpose of implementing a compensation algorithm. The measurement uncertainty was reduced by using appropriate hardware and software for the compensation of the various disturbances so that the application of the force platform would also be possible in the industrial application for the process diagnosis, the control and the regulation in machine tools. Systems based on strain gauge technology have some advantages in the field of zero-point stability and also provide a less expensive solution. For the disturbance compensation, an additional force and torque sensor system with eight channels was used for the detection of the platform displacement and inclination. With the help of appropriate algorithms for the disturbance compensation and their integration in the evaluation software, the disturbances could be reduced to a minimum.

Źródło:

Journal of Machine Engineering; 2020, 20, 3; 5-16
1895-7595
2391-8071

Pojawia się w:

Journal of Machine Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 17.

Tytuł:

Cross- section and material optimization of an automotive chassis using FEA

Autorzy:

Mangole, Hidaitulla

Powiązania:

https://bibliotekanauki.pl/articles/1182428.pdf

Data publikacji:

2017

Wydawca:

Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN

Tematy:

Automotive ladder chassis
FEA
Material and cross- section optimization

Opis:

The objective of this project is to seek out best material and most fitted cross-section for an Eicher E2 Truck ladder chassis with the constraints of most shear stress, equivalent stress and deflection of the chassis under maximum load condition. In present the Ladder chassis that are uses for creating buses and trucks are C and that I cross section sort, that area unit product of Steel alloy (Austenitic). In Asian country variety of passengers travel within the bus isn't uniform, excess passengers area unit movement within the buses daily as a result of that there are unit forever prospects of being failure/fracture within the chassis/frame. So Chassis with high strength cross section is required to attenuate the failures together with issue of safety in design. Within the present work, we have taken higher strength because the main issue, that the dimensions of an existing vehicle chassis of an Eicher E2 (Model no.11.10) Truck is taken for analysis with materials specifically ASTM A710 Steel, ASTM A302 steel and metal Alloy 6063-T6 subjected to constant load. Vehicle chassis are modelled by considering two different cross-sections specifically C and Rectangular Box (Hollow) sort cross sections.

Źródło:

World Scientific News; 2017, 69; 98-110
2392-2192

Pojawia się w:

World Scientific News

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 18.

Tytuł:

Theoretical and experimental analysis of loading impact from the progressive gear on the lift braking distance with the use of the free fall method

Autorzy:

Lonkwic, P.
Różyło, P.

Powiązania:

https://bibliotekanauki.pl/articles/103063.pdf

Data publikacji:

2016

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

friction drive lift
progressive gears
safety
FEA analysis
Abaqus

Opis:

The gear which is the central safety element of the friction drive lift during braking is exposed to overloading connected with changeable weight which loads the lift braking system. In the article the results of numerical analysis for braking process of CHP 2000 type progressive gear distinguished by an innovative design have been presented. The numerical analysis was conducted with the use of a simulation of the gear roller displacement depending on changeable loading with the support of Abaqus/CAE software. Displacement of the gear roller from the neutral position in which the gear starts loosing energy of speeding up weight to zero was simulated. The results obtained from computer simulations were verified on the basis of a physical experiment at the bench station created to verify braking parameters of the gears with the use of free fall method.

Źródło:

Advances in Science and Technology. Research Journal; 2016, 10, 30; 103-109
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 19.

Tytuł:

Experimental Study of Failure Analysis in Notched and Repaired Fiberglass Epoxy Composite

Autorzy:

Hassoon, Omar Hashim
Enzi, Abass
Kashkool, Lujain H.

Powiązania:

https://bibliotekanauki.pl/articles/2172353.pdf

Data publikacji:

2022

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

damage analysis
GFRP
repaired GFRP
finite element analysis
FEA

Opis:

The composite materials are remarkably increasing in many industry sectors like aircraft, automobiles, oil pipes, and marine boats. This attention comes from their excellent properties, such as lightweight and high strength. However, these materials expose many damages like fiber-matrix debonding, matrix crack, and delamination. The composite structures risked damage through the service life and therefore need to repair to achieve their function with a good performance. This paper focuses on the analysis during the tensile test of samples of fiberglass epoxy composite materials exposed to damage before and after repair. Experimental and numerical investigations are performed to determine and identify mechanical properties and failure analysis between repaired and unrepaired composite plates. Five samples are selected: without hole, 4 mm hole-repaired, stepped hole from 4 to 8 mm, and stepped hole from 4 to 8 mm-repaired. Simulation models are created using the finite element (FE) method to compare them with Abaqus's practical experiments to predict damage during the tensile test. To simulate damage models, interlaminar and intralaminar damage, were used to study initiation and propagation of the samples failure. Results show that the experimental and numerical investigations of the repaired samples have a significant effect on the mechanical properties and failure behavior of the holed and stepped plates compared with unrepaired samples. Also, maximum stress and strain are concentrated around and on both sides of the hole, while the most significant damage occurs around the hole and the axial direction.

Źródło:

Advances in Science and Technology. Research Journal; 2022, 16, 2; 99--108
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 20.

Tytuł:

Analysis of load transfer into composite structure

Autorzy:

Szymczyk, E.
Jachimowicz, J.
Puchała, K.

Powiązania:

https://bibliotekanauki.pl/articles/118025.pdf

Data publikacji:

2014

Wydawca:

Polskie Towarzystwo Promocji Wiedzy

Tematy:

mechanical joint
adhesive joint
composite material
load transfer
FEA

Opis:

The paper presents advantages and disadvantages of metal foils insertion between composite layers. Composites are complex materials of aniso-tropic structure leading to various failure mechanisms. Mechanism of compressive load transfer into composite laminates by shear of the matrix is analysed. The method of improvement compressive strength of laminates is presented according to literature and analysed for a sele-cted case. Simplified models of a laminate structure modified using various metal foils configurations are analysed with MSC.Marc code. Axial stress in prepreg layers and shear stress in adhesive layers are studied.

Źródło:

Applied Computer Science; 2014, 10, 3; 86-94
1895-3735

Pojawia się w:

Applied Computer Science

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 21.

Tytuł:

Dynamic finite element analysis of rotor-shaft fastening into a heavy precise lathe

Autorzy:

Dounar, Stanislau
Jakubowski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/1818744.pdf

Data publikacji:

2021

Wydawca:

Akademia Morska w Szczecinie. Wydawnictwo AMSz

Tematy:

finite element analysis (FEA)
lathe
rotor
renovation
rigidity
reinforcement

Opis:

The results of finite element analysis of large machined rotor fastened into heavy precise lathe are reported. Many design changes are simulated to improve the dynamic rigidity of the machining. Three radial eigenmodes detrimental to the accuracy were revealed: rotor-stock bending at 17.7 Hz (“half-wave”), rotor-lathe bending at 36.1 Hz (“full-wave”), and “support rocking” at 68.1 Hz. The frequency response functions and dynamic rigidities were evaluated. Three compliance issues were revealed: angular flexibility of the spindle console, low stiffness of the lathe bed (with boots), and an excessively slender tailstock. It is proposed to transform the spindle chuck into a table with additional hydrostatic backing, fill the bed cavities with concrete, and redesign the tailstock as a counter-spindle unit. This will decrease the amplitude of the main rotor resonance by 6.3 times and upshift the frequency near two-fold from 17.7 to 35 Hz. The renovated lathe should be able to machine a rotor without a lunette system or overriding the main resonant frequency.

Źródło:

Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2021, 66 (138); 37-45
1733-8670
2392-0378

Pojawia się w:

Zeszyty Naukowe Akademii Morskiej w Szczecinie

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 22.

Tytuł:

Skew Bending of Aircraft Fuselage Panels with “L” and “C” Stringers Mounted by Hybrid Joint
Ukośne zginanie poszycia samolotu z u sztywnieniami typu “L” i “C”, mocowanymi za pomocą złącza hybrydowego

Autorzy:

Sadowski, T.
Golewski, P.

Powiązania:

https://bibliotekanauki.pl/articles/355204.pdf

Data publikacji:

2015

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

skew bending of hybrid joint
plastic deformation processes
FEA (finite element analysis)
zginanie ukośne
złącze hybrydowe
proces deformacji
FEA
metoda elementów skończonych

Opis:

A section of fuselage skin with dimension 30 x 200 mm was subjected to numerical study and loaded by skew bending (Fig. 3). The thickness of the skin was 0,6 mm, the length of a leg of an angle “L” profile stringer was 12 mm with 1mm thickness. The angle of inclination α of the load plane to the skin plane varies in the range from 10° to 90° with 10° increment. The elastic - plastic material model of D16T aluminum alloy was used in simulations of the fuselage skin as well as for “L” and “C” profile stringers. In the material model description damage of aluminum alloy was taken into account. An adhesive layer with thickness of 0,1mm was modeled using cohesive elements with the failure mode depending on the shear strength and the tensile strength. The paper presents a comparative analysis of the considered structural elements with application of the unsymmetrical “L” profile or the symmetrical “C” profile with the same cross section area. All numerical studies were performed in Abaqus program. Finally, one can conclude that the stiffness of the structural element with application of the symmetrical “C” profile stringer is stronger, whereas the mechanical response of both versions of the hybrid joint significantly depends on the angle of load inclination α.
Badaniom numerycznym poddano wycinek poszycia o wymiarach 30x200mm, który następnie poddano obciążeniu poprzez ukośne zginanie, Rys. 3. Grubość blachy poszycia wynosiła 0,6 mm, długość ramienia kątownika równoramiennego 12 mm i grubość ramienia 1mm. Kąt nachylenia α płaszczyzny obciążenia w stosunku do płaszczyzny poszycia zmieniał się w granicach od 10° do 90° z przyrostem co 10°. W symulacjach zastosowano model sprężysto – plastyczny materiału dla poszycia i kształtownika jakim był stop aluminium D16T. W opisie modelu materiału uwzględniono także uszkodzenie stopu aluminium. Warstewka kleju o grubości 0,1 mm była modelowana z wykorzystaniem elementów kohezyjnych, dla których także uwzględniono uszkodzenie przyjmując dane producenta, takiej jak wytrzymałość na ścinanie oraz na rozciąganie. W pracy przedstawiono analizę wpływu zmiany obecnie stosowanego niesymetrycznego kształtownika (kątownik), kształtownikiem symetrycznym (ceownik) o takim samym polu przekroju poprzecznego. Wszystkie badania numeryczne przeprowadzono w programie Abaqus.

Źródło:

Archives of Metallurgy and Materials; 2015, 60, 4; 2813-2820
1733-3490

Pojawia się w:

Archives of Metallurgy and Materials

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 23.

Tytuł:

Study of functional performance improvements for cutting teeth mounted on bucket wheel excavators operating in Oltenia coal basin – Romania

Autorzy:

Popescu, F. D.
Radu, S. M.
Andras, A.

Powiązania:

https://bibliotekanauki.pl/articles/111230.pdf

Data publikacji:

2018

Wydawca:

Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH

Tematy:

deformation
stress
rotor
cutting tooth
BWE
tooth holder
FEM
FEA

Opis:

The values of the resultant forces acting on the cutting teeth of BWEs can either be calculated or determined using experimental methods. Based on this, the position and parameters of the working organs during the cutting process are designed and built. The stresses and deformations of the teeth during the cutting process are influenced by their positioning on the excavator bucket, which is determined by the fitting mode of the teeth. In this paper, the stresses and deformations in the case of an existing tooth holder are analysed and a new type of tooth holder is proposed, using SolidWorks® software for this analysis.

Źródło:

Mining – Informatics, Automation and Electrical Engineering; 2018, 56, 3; 7-11
2450-7326
2449-6421

Pojawia się w:

Mining – Informatics, Automation and Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

Artykuł

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Skocz do pozycji: 24.

Tytuł:

Differential designing for FSAE motor sports vehicle JCU

Autorzy:

Marciano, Pieta
Wheatley, Greg
Ali, Ahmed

Powiązania:

https://bibliotekanauki.pl/articles/2173482.pdf

Data publikacji:

2022

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

torque transition
shaft system
FEA
przejście momentu obrotowego
układ wałów

Opis:

The objective of this work was to design a differential assembly for an FSAE motor sports vehicle. The designed differential system consists of 3 braces made of AISI 1045 steel. The output shafts were made of AISI 4140 steel with hardened splines. These shafts were initially going to drive 94 mm constant velocity shafts. A 75 mm tripod joint was used to minimize the weight and cost of the system. The housing was held together with grade 12.8 hex head bolts, and the shafts were bolted onto the tri-pod joints using bolts of grade 8.8 which complies with FSAE rules. The input shaft which acts on the differential itself is made of EN36A steel and is where the drive sprocket is bolted to. All components were modeled using Finite Element Analysis to determine stresses and displacements under operating conditions.

Źródło:

Zeszyty Naukowe. Transport / Politechnika Śląska; 2022, 114; 67--78
0209-3324
2450-1549

Pojawia się w:

Zeszyty Naukowe. Transport / Politechnika Śląska

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 25.

Tytuł:

Digital Twin For Fatigue Analysis

Autorzy:

Chabod, Amaury
Baron, Nicholas

Powiązania:

https://bibliotekanauki.pl/articles/2105141.pdf

Data publikacji:

2020

Wydawca:

Sieć Badawcza Łukasiewicz - Instytut Lotnictwa

Tematy:

fatigue analysis
digital twin method
modal analysis
test-FEA correlation

Opis:

The main design parameters that impact the fatigue of components are geometry, material and loading. Simulation with Finite Element Analysis (FEA) and tests on a vibrating table are often used to understand the dynamic behaviour of components and thus validate those items. Accelerated tests are used for the mission profile and test definition, as described in GAM-EG-13, MIL-STD-810F and RTCA DO-160E. The shock response spectrum (SRS) and the extreme response spectrum (ERS) allow for a comparison of the power spectrum density (PSD) and the acceleration factor applied in terms of fatigue severity through the fatigue damage spectrum (FDS). In addition, the hypothesis of linear damage accumulation enables the combination of several events for specifying a mission profile. Ultimately, the mission profile, which represents a usage that might span over several years, can be reduced to a shorter duration with a damage extraction technique. This is particularly useful for the definition of vibrating table specifications. An advantage of the virtual vibrating table is the reduction of the number of prototypes and the understanding of failure modes. To achieve this objective, finite element analysis in the frequency domain (harmonic analysis) is used and the structural stress response is evaluated with a PSD loading. A statistical model of rainflow allows assessing the damage on the components. The presentation also shows the effects of the damping factor on damage results. To achieve accurate results and define a Digital Twin, the correlation between test results and the finite element analysis is fundamental. Experimental modal analysis, based on the measured acceleration responses, helps to validate calculated modal frequencies and to assess the damping for each mode. This study shows the importance and the sensitivity on damping of the structural response, and in turn on fatigue.

Źródło:

Fatigue of Aircraft Structures; 2020, 12; 47--56
2081-7738
2300-7591

Pojawia się w:

Fatigue of Aircraft Structures

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 26.

Tytuł:

FEA-analysis of shaft and supports deformations for huge precise lathe. Statics and resonances

Autorzy:

Dounar, Stanislau
Lakimovitch, Alexandre
Ausiyevich, Andrei
Jakubowski, Andrzej

Powiązania:

https://bibliotekanauki.pl/articles/27315928.pdf

Data publikacji:

2018

Wydawca:

STE GROUP

Tematy:

tokarka
MES
wirnik
linia środkowa
rezonans
lathe
FEA
rotor
centerline
resonance

Opis:

Load bearing system simulation is provided for a huge lathe to be renovated. Static and modal analyses are done by FEM. Focus was centerline rising, needed for larger rotor shaft machining. Forces between shaft and three supports were applied. Shaft static stiffness is lowered at 1.15 times only for 600 mm centerline rising. Supports have lost its rigidity at 1.42 times. Concrete pouring into bed cavities is recommended for supports flexibility limitation such as tailstock reinforcement. Robustness of bottom resonances is revealed both for rotor shaft (14.5-18.2 Hz) and supports (42.7-55.4 Hz). Centerline rising is allowed on 300 mm at least. It gives possibility to machine extremely large (up to ø2750 mm) shafts.

Źródło:

New Trends in Production Engineering; 2018, 1, 1; 341-348
2545-2843

Pojawia się w:

New Trends in Production Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 27.

Tytuł:

Testing of the torsional stiffness of the passenger car frame and its validation by means of finite element analysis

Autorzy:

Podkowski, Krzysztof
Małczuk, Adrian
Stasiak, Andrzej
Pawlak, Maciej

Powiązania:

https://bibliotekanauki.pl/articles/263004.pdf

Data publikacji:

2019

Wydawca:

Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji

Tematy:

vehicle torsional stiffness
FEM
FEA
validation
passive safety of the vehicle

Opis:

The paper presents the results of the conducted tests of torsional stiffness of the VOSCO S106 passenger car, as well as the validation process of these tests by means of numerical analyzes using the FEM finite element method. The most important element of the vehicle structure is the part of the spatial frame or the safety cage. Engine, brake system, fuel system and steering system, suspension as well as body and parts, their mounting nodes, hinges, locks, etc. are attached to the frame. The frame must therefore have adequate strength to protect the driver in the event of a tipover or impact. The frame is usually made of steel pipes with the prescribed dimensions and strength according to regulations. The torsional stiffness of the vehicle chassis has a significant influence on its driveability and therefore is an important parameter to measure. In this article, the torsional stiffness of the vehicle frame is calculated experimentally, which was then verified by finite element analysis (FEM) using the Altair HyperWorks program.

Źródło:

Archiwum Motoryzacji; 2019, 85, 3; 83-101
1234-754X
2084-476X

Pojawia się w:

Archiwum Motoryzacji

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 28.

Tytuł:

Design of a height-adjustable boarding system for a new double-deck railway vehicle

Autorzy:

Šťastniak, Pavol
Rakár, Michal
Tížek, Jakub

Powiązania:

https://bibliotekanauki.pl/articles/2204671.pdf

Data publikacji:

2023

Wydawca:

Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej

Tematy:

double-deck railway vehicle
boarding system
railway station platform
simulation
FEA

Opis:

This paper deals with a solution for faster and safer boarding and leaving of passengers at railway station platforms from 150 mm to 550 mm higher than the head of the rail. This conception is based on the requirements of railway infrastructure administrators, transporters and also manufacturers of passenger rolling stock. This device is designed for the new double-deck railway vehicle for suburban and regional transport, which fulfils legislative and normative requirements that are specified for the selected area of vehicle construction and operational features. Selected parts of the construction were verified through a series of simulation analyses. This article also includes a study that deals with optimization of the boarding area considering designed changes in the construction of the floor and a draft for modification of the vertical clearance of the boarding entrance area in a rough construction of the vehicle.

Źródło:

Acta Mechanica et Automatica; 2023, 17, 1; 44--51
1898-4088
2300-5319

Pojawia się w:

Acta Mechanica et Automatica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 29.

Tytuł:

Material Selection of Collapsible Pot Hauler and Finite Element Analysis Simulation Applied to the Selected Material

Autorzy:

Surya Hadi Saputra, Rahmad
Iskandar, Budhi Hascaryo
Kurniawati, Vita Rumanti
Desrial, Desrial
Purbayanto, Ari

Powiązania:

https://bibliotekanauki.pl/articles/2201910.pdf

Data publikacji:

2023

Wydawca:

Stowarzyszenie Inżynierów i Techników Mechaników Polskich

Tematy:

materials selection
multi-criteria decision making
MCDM
finite element analysis
FEA

Opis:

The current collapsible pot hauler uses a wooden frame, thus making much space in the working area of the fishing boat and also at this time challenging to find the best quality wood at this time. In this study, the wood material would replace by metal; the selection of the proper material is critically needed. A suitable material means the applied material has to deal with environmental conditions. Finding the appropriate material applied to the collapsible pot hauler; can be determined using a Multi-Criteria Decision Making (MCDM) approach. After selecting the proper material, the collapsible pot hauler simulates the material stress using the Finite Element Analysis (FEA) simulation. The material for the new model of collapsible pot hauler was selected using the WSM method. The material with the highest rank (selected) is AISI 304, with a preference value of 3.58. The static strength simulation using the FEA method utilizing Solidworks Software shows that the yield strength value is still below the material properties, which a maximum value is 200. MPa, the material safety factor is the minimum value above one, which is 1.24 on the line spool plate shafts. It means that the material AISI 304 is safe to be applied to the collapsible pot hauler.

Źródło:

Advances in Science and Technology. Research Journal; 2023, 17, 2; 289--298
2299-8624

Pojawia się w:

Advances in Science and Technology. Research Journal

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 30.

Tytuł:

Numerical Investigation of the Propagation Characteristics of Surface Transverse Wave Considering Various Quartz Substrate and Electrode Configurations

Autorzy:

Jiang, Chao
Cao, Xiaoli
Yang, Feng
Liu, Zejun

Powiązania:

https://bibliotekanauki.pl/articles/31339822.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

surface transverse wave
STW
interdigital transducer
IDT
finite element analysis
FEA
quartz

Opis:

Featured with a higher velocity, increased power handling capability, and better aging behavior, surface transverse wave (STW) shows more promising prospects than Rayleigh wave nowadays in various sensing applications. The need to design, optimize, and fabricate the related devices motivates the development of modeling and simulation. For this reason, a three-dimensional (3D) finite element (FE) simulation of STW on quartz, considering the crystal cut angle and the electrode effects, is presented in this study. Firstly, we investigated the effects of quartz’s cut angle on the generated waves. Here, the polarized displacements were analyzed to distinguish the wave modes. Secondly, the investigations of the electrode effects on the polarized displacement, phase velocity, and electromechanical coupling factor (K²) were carried out, for which different material and thickness configurations for the electrodes were considered. Thirdly, to examine the excitation conditions of the generated waves, the admittance responses were inspected. The results showed that not only the crystal cut angle but also the density and the acoustic impedance of the interdigital transducer (IDT) material have a strong influence on the excited waves. This article is the first to analyze STWs considering quartz’s cut angle and electrode effect through a 3D FE model. It could provide a helpful and easy way to design, optimize, and fabricate the related surface acoustic wave devices.

Źródło:

Archives of Acoustics; 2023, 48, 3; 403-412
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

Tytuł:

Parametric analysis for the design of a 4 pole radial permanent magnet generator for small wind turbines

Autorzy:

Quintal-Palomo, R.
Dybkowski, M.
Gwoździewicz, M.

Powiązania:

https://bibliotekanauki.pl/articles/1193263.pdf

Data publikacji:

2016

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

permanent magnet synchronous generator
PMSG
finite element analysis
FEA
small wind turbines
SWT

Opis:

A review of the literature gives several guidelines for the design of a Permanent Magnet Synchronous Generator (PMSG) for Small Wind Turbines (SWT) applications. This paper presents Finite Element Analysis (FEA) of a Surface Mounted PMSG. Several optimization tests are run in order to yield the lowest Total Harmonic Distortion (THD) and cogging torque with the highest induced voltage. The results of the optimization tests are then utilized to design an initial “optimized” circumferential Internal PMSG. This optimized design is then compared to a non-optimized design, as well as the results of the Surface Mounted PMSG.

Źródło:

Power Electronics and Drives; 2016, 1, 36/2; 175-186
2451-0262
2543-4292

Pojawia się w:

Power Electronics and Drives

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 32.

Tytuł:

Analiza rozmieszczenia otworów w rozciąganej tarczy z wykorzystaniem metody SADSF oraz szacowanie trwałości zmęczeniowej
Analysis of hole arrangement in tensile plate by means of the SADSF method and fatigue life predictions

Autorzy:

Markiewicz, I.

Powiązania:

https://bibliotekanauki.pl/articles/301657.pdf

Data publikacji:

2009

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

projektowanie
nośność graniczna
analiza MES
analiza zmęczeniowa
design
limit analysis
FEA
fatigue analysis

Opis:

Praca przedstawia wyniki analiz sprężystych MES i szacowania trwałości zmęczeniowej rozciąganej tarczy prostokątnej osłabionej otworami. Odległości pomiędzy otworami wyznaczono metodą SADSF. Rozważono dwa przypadki, gdy otwory są rozłożone w rzędzie prostopadle do kierunku działania obciążenia oraz wzdłuż tego kierunku. Podczas analiz stwierdzono, że najlepsze minimalne odległości pomiędzy otworami - w przypadku gdy otwory są rozłożone w płaszczyźnie prostopadłej do kierunku działania obciążenia - leżą bardzo blisko wartości otrzymanych przy pomocy metody SADSF. Zmniejszając rozstawy poniżej wymiarów wyznaczonych tą metodą obserwuje się bardzo szybki wzrost współczynnika koncentracji naprężenia i spadek trwałości zmęczeniowej. W drugim przypadku tak wyraźnego efektu nie stwierdzono. W miarę zmniejszania się rozstawu otworów, współczynnik koncentracji stale maleje, a trwałość zmęczeniowa rośnie.
The paper presents the results of elastic FE analyses and estimations of fatigue life of a tensile rectangular plate weakened by the presence of holes. The distances between the holes were determined by means of the SADSF method. Two cases were considered: when the holes are arranged in a row perpendicularly to the direction of load, and parallel to this direction. In the case of holes lying in a plane perpendicular to the load direction, the analyses have shown that the best minimal distances between the holes are very close to those obtained by using the SADSF method. When the hole spacing is decreased below the dimensions determined by this method, one observes a rapid growth of stress concentration factor and a drop of fatigue life. In the second case, however, one does not observe such strong effects. As the hole spacing decreases, stress concentration factor continuously drops down, and fatigue life increases.

Źródło:

Eksploatacja i Niezawodność; 2009, 3; 24-31
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 33.

Tytuł:

Computationally efficient method for determining the most important electrical parameters of axial field permanent magnet machine

Autorzy:

Smoleń, A.
Gołębiowski, M.

Powiązania:

https://bibliotekanauki.pl/articles/202137.pdf

Data publikacji:

2018

Wydawca:

Polska Akademia Nauk. Czytelnia Czasopism PAN

Tematy:

axial flux permanent magnet
2D FEA
numerical optimization
magnes stały
optymalizacja numeryczna

Opis:

This paper describes a numerically efficient method for determining the electrical parameters of axial field permanent magnet machine (AFPM). The presented method aims to accurately determine the back EMF waveform and self-inductance coefficients, while maintaining possibly low computational complexity, which is crucial in case of incorporation of the method in numerical optimization procedure of AFPM construction. The described algorithm is based on 2D FEM with several simplifications. The obtained results have been compared with full 3D FEA conducted with Ansys/Maxwell software, and confirmed by measurements. The result shows that presented method ensures satisfactory accuracy as well as computational time performance.

Źródło:

Bulletin of the Polish Academy of Sciences. Technical Sciences; 2018, 66, 6; 947-959
0239-7528

Pojawia się w:

Bulletin of the Polish Academy of Sciences. Technical Sciences

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 34.

Tytuł:

Projektowanie metodą SADSF i analizy własności sprężystych i zmęczeniowych pasm rozciąganych z otworem
Application of SADSF method to design and analyses of elastic and fatigue properties of tensioned strip with hole

Autorzy:

Markiewicz, I.

Powiązania:

https://bibliotekanauki.pl/articles/300994.pdf

Data publikacji:

2010

Wydawca:

Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN

Tematy:

projektowanie
nośność graniczna
analiza MES
analiza zmęczeniowa
design
limit analysis
FEA
fatigue analysis

Opis:

Praca przedstawia rezultaty projektowania metodą SADSF oraz wyniki liniowych analiz MES i szacowania trwałości zmęczeniowej metodą odkształceń lokalnych pasm rozciąganych z otworem w części centralnej. Podstawowym celem pracy jest potwierdzenie przydatności metody SADSF, która zakłada warunek wyrównanego wytężenia w stanie granicznym, do projektowania elementów pracujących w zakresie sprężystym i przy obciążeniach zmiennych w czasie. Metoda SADSF bowiem, jako jedna z niewielu, pozwala efektywnie rozwiązywać zadania projektowania nawet bardzo złożonych konstrukcji. Może być tym samym konkurencyjna dla bardzo zaawansowanych metod tzw. optymalizacji topologicznej. Metoda SADSF, w odróżnieniu od nich, nie wymaga stosowania pracochłonnych procedur optymalizacyjnych i może być z łatwością wykorzystana w projektowaniu inżynierskim. Co więcej można ją stosować już w chwili, gdy dane są tylko warunki brzegowe. Z użyciem metody SADSF zbudowano całą serię rozwiązań pasm spełniających założone warunki brzegowe i posiadających otwór w części centralnej. Przeprowadzone analizy potwierdziły dobre własności zaprojektowanych elementów, a otrzymane rozwiązania wskazały takie sposoby ich konstruowania, które dają niskie koncentracje naprężenia i dużą trwałość zmęczeniową.
The paper presents the results of design, by the SADSF method, of tensioned strips with holes in the central part, and the results of linear FEM analyses. Estimation of fatigue life by local strain method is also presented. The essential aim of the work is to confirm the usefulness of the SADSF method, which assumes the condition of equalized effort in limit state, to designing elements working in elastic rage, and subjected to loads variable in time. The SADSF method is one of few methods which make it possible to effectively solve the design problems, also in the cases of very complex structures. Then, it can be competitive to very advanced methods of the so-called topology optimization. The SADSF method, unlike the latter ones, does not require applying laborious optimization procedures, and can be easily used in engineering design. Moreover, it can be applied already at the moment when only boundary conditions are known. Using the SADSF method, we have constructed a whole series of solutions of strips having a hole in the central part, which satisfy the assumed boundary condition. The carried-out analyses have confirmed good qualities of the designed elements, and the obtained solutions have shown how to select such design methods, which give low stress concentration and high fatigue life.

Źródło:

Eksploatacja i Niezawodność; 2010, 1; 4-14
1507-2711

Pojawia się w:

Eksploatacja i Niezawodność

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 35.

Tytuł:

Application of anisotropic thin plate theory for development of displacements for silicon <111> crystals plates in cylindrical systems

Autorzy:

Javidinejad, A.

Powiązania:

https://bibliotekanauki.pl/articles/266080.pdf

Data publikacji:

2016

Wydawca:

Uniwersytet Zielonogórski. Oficyna Wydawnicza

Tematy:

elastyczność
cienka płyta
ciśnienie
anisotropic
pressure diaphragm
FEA
thin plate elasticity
transverse isotropic

Opis:

Silicon <111> crystal is one of the crystal orientations, which shows potential for application in micro device developments of pressure diaphragms for measurement purposes. To date, no theoretical basis has been examined to develop the deflections for computational analysis purposes [1]. This paper presents the development of the diaphragm deflections for Silicon <111> Crystal in Cylindrical coordinates system. The Silicon <111> crystal possesses transverse isotropic properties. Thus, an anisotropic thin plate theory is used here to develop the plate deflection. A numerical example is given to compare the theoretical results with Finite Element Analysis (FEA) results.

Źródło:

International Journal of Applied Mechanics and Engineering; 2016, 21, 4; 879-890
1734-4492
2353-9003

Pojawia się w:

International Journal of Applied Mechanics and Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 36.

Tytuł:

Comparative analysis of the power parameters of a line start permanent magnet synchronous motor using professional FEM packages and in-house software

Autorzy:

Baranski, Mariusz

Powiązania:

https://bibliotekanauki.pl/articles/27309928.pdf

Data publikacji:

2023

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

FEA
in-house software
measurement verification
professional FEM packages
finite element software packages

Opis:

The paper discusses the methods for calculating the power parameters of a line start permanent magnet synchronous motor (LSPMSM). The calculations have been performed using the author’s specialized FEM software and professional FEM packages, ANSYS Maxwell and COMSOL Multiphysics. The author’s algorithm for solving equations of the electromagnetic field based on the FEM has been presented. The in-house software developed on this algorithm and professional software have been used to analyse the power parameters of the LSPMS motor. In addition, both calculation time and accuracy were analysed. The calculation results were compared to the measurement results.

Źródło:

Archives of Electrical Engineering; 2023, 72, 3; 585--596
1427-4221
2300-2506

Pojawia się w:

Archives of Electrical Engineering

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

Tytuł:

Experimental and numerical investigation of the deep drawing process for an automobile panel and prediction of appropriate amount of parameters by multi-layer neural network

Autorzy:

Najafabadi, S. S.
Anaraki, A. T.
Moradi, M.

Powiązania:

https://bibliotekanauki.pl/articles/281868.pdf

Data publikacji:

2017

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

deep drawing
finite element analysis (FEA)
multi-layer artificial neural network (ANN)
Taguchi design

Opis:

In this paper, the deep drawing process of an automobile panel in order to select the appropriate amount of parameters has been investigated. The parameters include friction between the blank and die, blank width and length, blank thickness and gap between the blank and blank-holder. A multi-layer artificial neural network (ANN) trained by finite element analyses (FEA) is applied in order to improve forming parameters and achieve a better quality. As the FEA results are used to train the ANN, the FEA results have been verified by three experiments. Finally, an appropriate amount of each parameter is predicted by the trained ANN and a FEA has been done based on the ANN prediction to evaluate the accuracy of the trained ANN. Moreover, it is shown that the ANN could predict results within a 10 percent error. In addition, the proposed method for prediction of the appropriate parameters (ANN) is confirmed by comparing with the Taguchi design of experiment prediction. It is also shown that the model obtained by the former method has lower errors than the latter one. In this study, the Taguchi model is used to evaluate the effect of parameters on tearing and wrinkling. Based on the Taguchi design of experiment, while the blank length is the most effective parameter on tearing, the maximum height of wrinkles on flanged parts mainly depends on the blank thickness.

Źródło:

Journal of Theoretical and Applied Mechanics; 2017, 55, 2; 707-718
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 38.

Tytuł:

Analytical and Computational Acoustic Modelling of Side Outlet Muffler and Its Extension in the Modelling of Tapered Side Outlet Muffler

Autorzy:

Vishwakarma, Sandeep Kumar
Pawar, Jayappa

Powiązania:

https://bibliotekanauki.pl/articles/31339955.pdf

Data publikacji:

2022

Wydawca:

Polska Akademia Nauk. Czasopisma i Monografie PAN

Tematy:

1-D analysis
finite element analysis
FEA
sound pressure level
transfer matrix
transmission loss

Opis:

Mufflers are popular in the suppression of noise levels coming from various machinery. The most common parameters for the evaluation of the performance of mufflers are transmission loss, noise level, and insertion loss. The transmission loss is evaluated for tapered side outlet muffler using finite element analysis without considering the fluid-structure interaction. This study includes analytical modelling and acoustic modelling of the side outlet muffler and transmission loss is in excellent agreement with the reference paper. The feasibility of the acoustic model is also verified with the experimental work on simple expansion chamber muffler. The same finite element analysis is extended for the tapered side outlet muffler. The transmission loss of the tapered side outlet muffler in the given frequency range is found 8.96 dB better than the side outlet muffler. The acoustic pressure level and sound pressure level contours for the tapered side outlet muffler give a clear picture of wave propagation inside the muffler. The effect of the cut-off frequency on the transmission loss of the tapered side outlet muffler can be seen from the contours. This study can be helpful in the determination of the performance of the mufflers in terms of transmission loss, the performance of mufflers above cut-off frequency, and design improvements in the muffler to avoid the higher-order modes of the sound wave.

Źródło:

Archives of Acoustics; 2022, 47, 4; 491-499
0137-5075

Pojawia się w:

Archives of Acoustics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 39.

Tytuł:

Investigation of axial crushing behaviour of a composite fuselage model using the cohesive elements
Badania przebiegu osiowego zgniatania modelu kompozytowego kadłuba z wykorzystaniem elementów kohezyjnych

Autorzy:

Mustapha, F.
Sim, N. W.
Shahrjerdi, A.

Powiązania:

https://bibliotekanauki.pl/articles/280524.pdf

Data publikacji:

2012

Wydawca:

Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej

Tematy:

adhesively bonded joint
composite fuselage
FEA
crushing behaviour
C-glass fiber/epoxy
cohesive elements

Opis:

Finite element analysis (FEA) on a new fabrication miniature composite fuselage structure under axial compression loading is presented. ABAQUS/Explicit simulation is employed to predict the crushing behaviour and mechanical strength from the initial compression loading to the final failure mode. A woven C-glass fiber/epoxy 200 g/m2 composite laminated with orthotropic elastic material properties is used for the fuselage model. This proposed model is established to observe the crushing load and collapse modes under an axial compression impact. Adhesively bonded joint progression is generated using the technique of cohesive element. Various angles of the lamina are deliberated in the analysis to acquire and imagine the effect of the angle of orientation. Composite lamina angles are examined and validated using FEA modelling as a numerical parametric study. The results show that the finite element analysis using ABAQUS/Explicit can reproduce satisfactorily the load-deflection response. It can be concluded that special cases of antisymmetric lamination are found to have the strongest resistance to the applied load.
Pracę poświęcono analizie elementów skończonych w zastosowaniu do badań modelu miniaturowego kadłuba wykonanego z laminatu i poddanego osiowemu ściskaniu. Przeprowadzono symulacje numeryczne z użyciem komercyjnego oprogramowania ABAQUS/Explicit w celu określenia wytrzymałości kompozytu oraz zbadania przebiegu procesu zgniatania, aż do uzyskania ostatecznej postaci zniszczenia próbki. Na materiał kadłuba wybrano kompozyt w włóknem szklanym typu C o gęstości 200 g/m2 i właściwościach ortotropowych. Podczas badań obserwowano pojawianie się kolejnych postaci wgnieceń, aż do zupełnej utraty stateczności układu przy udarowym obciążeniu ściskającym. Zastosowano metodę elementów kohezyjnych do analizy zmian w adhezyjnym połączeniu warstw laminatu. Zbadano wpływ kąta laminowania na właściwości próbki. Przeprowadzono także badania parametryczne wpływu kąta laminowania modelu metodą elementów skończonych. Uzyskane wyniki wykazały, że symulacje wykonane w systemie ABAQUS/Explicit wiarygodnie odtwarzają rzeczywisty przebieg zgniatania w funkcji przykładanego obciążenia. Zaobserwowano również, że niektóre przypadki laminowania antysymetrycznego są szczególnie odporne na zniszczenie wywołane siłą osiową.

Źródło:

Journal of Theoretical and Applied Mechanics; 2012, 50, 2; 531-548
1429-2955

Pojawia się w:

Journal of Theoretical and Applied Mechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 40.

Tytuł:

Development of computer based procedure for quantitative evaluation of bus superstructure in type approval

Autorzy:

Nurhadi, I.
Zain, R.

Powiązania:

https://bibliotekanauki.pl/articles/246415.pdf

Data publikacji:

2010

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

ECE R66
bus superstructure
rollover test
FEA
quasi-static incremental loading
elastic plastic

Opis:

This paper deals with development of a computer simulation procedure, as a substitute for physical rollover test, to evaluate bus body structure crashworthiness. It is expected that, when completed, this procedure can be proposed to the authority to enhance its current type approval procedure related to crashworthiness which is merely based on qualitative and empirical field experiences without performing real rollover test. This procedure will enable afirmer base for judging the crashworthiness of bus structure. The proposed computer simulation procedure is being developed based on ECE R66 which allows partial bus body structure to be physically tested. In this case, sections of bus super structure built up from at least two bays are used to represent the whole structure. A finite element method computer program capable of dealing with elastic plastic calculation is employed to calculate deflection of a bay structure under incremental quasi-static loading until residual space limit is reached. From the obtained force-deflection curve, the strain energy absorption capacity of the structure will be evaluated if it is large enough to absorb potential energy resulting from rollover test. A bus body superstructure sample from a representative domestic bus manufacturer is used as test cases.

Źródło:

Journal of KONES; 2010, 17, 2; 371-378
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 41.

Tytuł:

Residual Ultimate Strength of Box Girders with Variable Cracks

Autorzy:

Ao, L.
Wang, D.

Powiązania:

https://bibliotekanauki.pl/articles/116262.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Morski w Gdyni. Wydział Nawigacyjny

Tematy:

cracks
Ship Stability
Hydrodynamics
Box Girders
FEA
Ultimate Strength
Residual Ultimate Strength
Crack Parameters

Opis:

The aim of the present study is to investigate the residual ultimate strength characteristics of box girders with variable cracks under torsional loading. A series of finite element models are established by changing the crack length and crack angle using a commercial FEA program, ABAQUS. The cracks are located at the center and torques are applied on both ends of the box beam. Different aspect ratios are considered to evaluate the effects of cracks on box beams for various widths and lengths of panels in the middle yielding region. The accuracy of the nonlinear FEA results is veri?ed by a comparison with previous predicted formulas. Based on the FEA results, the relationship between the residual ultimate strength and crack parameters can be indicated in a function with period of in the form of Fourier series.

Źródło:

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation; 2015, 9, 2; 193-198
2083-6473
2083-6481

Pojawia się w:

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 42.

Tytuł:

Shifter mechanism design for FSAE motor sports vehicle JCU

Autorzy:

Wheatley, Greg
Ali, Ahmed

Powiązania:

https://bibliotekanauki.pl/articles/2091242.pdf

Data publikacji:

2021

Wydawca:

Politechnika Śląska. Wydawnictwo Politechniki Śląskiej

Tematy:

mechanical shifter
solid linkage
spline attachments
FEA
mechaniczna skrzynia biegów
trwałe połączenie
mocowanie wielowypustowe
MES

Opis:

This report provides a design analysis of a replacement’s shifter mechanism for the 2014 model JCU Motorsports FSAE vehicle. Common FSAE shifter mechanisms were researched and reviewed to provide a better understanding of the needs required. A design approach was constructed to ultimately design a mechanism that conformed to all existing constraints and FSAE rules. Realistic load cases were identified and employed in the FEA analysis of the design. Supporting hand calculations were developed, proving the analysis to be accurate. Results showed the shifter mechanism does not fail under infinite life, with some parts of the design having a reasonably high safety factor, ensuring stability.

Źródło:

Zeszyty Naukowe. Transport / Politechnika Śląska; 2021, 113; 219--229
0209-3324
2450-1549

Pojawia się w:

Zeszyty Naukowe. Transport / Politechnika Śląska

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 43.

Tytuł:

Optimisation of osteosynthesis positioning in mandibular body fracture management using finite element analysis

Autorzy:

Daqiq, Omid
Roossien, Charlotte C.
Wubs, Friederik W.
Bos, Rudolf R.M.
van Minnen, Baucke

Powiązania:

https://bibliotekanauki.pl/articles/24987661.pdf

Data publikacji:

2023-06-26

Wydawca:

Gdański Uniwersytet Medyczny

Tematy:

Mandibular body fracture
Finite element analysis (FEA)
Polymeric model testing
Mandibular body height
Miniplate positioning

Opis:

Background: This proof of principle study aims to investigate the applicability of finite element analysis (FEA) in Oral and Maxillofacial (OMF) surgery, by studying the effect of mandibular body height and osteosynthesis positioning on unilateral mandibular body fractures based on Champy’s technique. Material and methods: Mandibles made of polyurethane foam (Synbone®), with heights of 18, 14, and 10 mm were used to create a FEA model with a unilateral straight-line fracture, fixated with a standard commercially available 6-hole 2 mm titanium miniplate. Two different FEA programs were used for the comparison, namely: Solidworks and Comsol Multiphysics. The FEA outcomes were compared with a series of mechanical tests with polymeric models fixed in a customised device and loaded onto a mechanical test bench. Results: First, the study illustrated that the optimal plate position appeared to be the upper border. Second, lower mandibular height increases instability and requires a stronger osteosynthesis system. Conclusions: FEA’s and polymeric model testing outcomes of unilateral non-comminuted fractures were highly comparable with current opinions of mandibular fracture management. The promising outcome of this study makes it worthwhile to do more extensive analysis in order to determine whether FEA alone is sufficient for optimisation of fracture management.

Źródło:

European Journal of Translational and Clinical Medicine; 2023, 6, 2; 10-25
2657-3148
2657-3156

Pojawia się w:

European Journal of Translational and Clinical Medicine

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 44.

Tytuł:

Computer modelling of energy absorbing capability of bus superstructure for rollover safety

Autorzy:

Nurhadi, I.
Zain, R.
Mihradi, S.
Soe Oo, K.

Powiązania:

https://bibliotekanauki.pl/articles/242230.pdf

Data publikacji:

2011

Wydawca:

Instytut Techniczny Wojsk Lotniczych

Tematy:

ECE R66
bus superstructure
rollover test
residual space
FEA
quasi-static incremental loading
elastic-plastic

Opis:

This paper describes further investigations that have been carried out to make the proposed procedure [5] becomes more reliable to be practically applied as a requirement in bus type approval. One important aspect highlighted in this paper is an effort to improve the accuracy of the FEA model by taking into account detailed construction of bus superstructure. It worth to note that, based on survey carried out on several bus manufacturers, the detailed construction may vary from manufacturer to manufacturer. As a case study, a bus superstructure from a prominent manufacturer was chosen as a sample. Energy absorbing capacity of a bus superstructure section consisting of four bays including rear entrance door, emergency door and rear end was investigated through elastic-plastic finite element model. Incremental quasy static load according to ECE R66 was applied, subsequently to the right and left cantrail to obtain load deflection curve. Then the energy absorbing capacity of the structure when residual space limit was reached was evaluated through derived energy deflection curve. Essential components of the bus superstructure governing its energy absorbing capacity will be discussed. Modeling strategy in dealing with elastic-plastic analysis for such a rather complex structure is also highlighted.

Źródło:

Journal of KONES; 2011, 18, 2; 331-338
1231-4005
2354-0133

Pojawia się w:

Journal of KONES

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 45.

Tytuł:

Analytical and numerical free vibration analysis of porous functionally graded materials (FGPMs) sandwich plate using Rayleigh-Ritz method

Autorzy:

Njim, E.K.
Bakhy, S.H.
Al-Waily, M.

Powiązania:

https://bibliotekanauki.pl/articles/2175769.pdf

Data publikacji:

2021

Wydawca:

Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach

Tematy:

FGM sandwich plate
porosity parameter
CPT
free vibration
FEA
płyta warstwowa FGM
parametr porowatości
drgania swobodne

Opis:

Purpose: This study introduces a new approximated analytical solution of the free vibration analysis to evaluate the natural frequencies of functionally graded rectangular sandwich plates with porosities. Design/methodology/approach: The kinematic relations are developed based on the classical plate theory (CPT), and the governing differential equation is derived by employing the Rayleigh-Ritz approximate method. The FGM plate is assumed made of an isotropic material that has an even distribution of porosities. The materials properties varying smoothly in the thickness direction only according to the power-law scheme. Findings: The influences of changing the gradient index, porosity distribution, boundary conditions, and geometrical properties on the free vibration characteristics of functionally graded sandwich plates are analysed. Research limitations/implications: A detailed numerical investigation is carried out using the finite element method with the help of ANSYS 2020 R2 software to validate the results of the proposed analytical solution. Originality/value: The results with different boundary conditions show the influence of porosity distribution on the free vibration characteristics of FG sandwich plates. The results indicated a good agreement between the approximated method such as the Rayleigh-Ritz and the finite element method with an error percentage of no more than 5%.

Źródło:

Archives of Materials Science and Engineering; 2021, 110, 1; 27--41
1897-2764

Pojawia się w:

Archives of Materials Science and Engineering

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 46.

Tytuł:

Numerical modelling of structures with uncertainties

Autorzy:

Kahsin, M.

Powiązania:

https://bibliotekanauki.pl/articles/260542.pdf

Data publikacji:

2017

Wydawca:

Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa

Tematy:

wind turbine
offshore
FEA
modal analysis
dynamic coupling
sensitivity analysis
design of experiment
response surface method

Opis:

The nature of environmental interactions, as well as large dimensions and complex structure of marine offshore objects, make designing, building and operation of these objects a great challenge. This is the reason why a vast majority of investment cases of this type include structural analysis, performed using scaled laboratory models and complemented by extended computer simulations. The present paper focuses on FEM modelling of the offshore wind turbine supporting structure. Then problem is studied using the modal analysis, sensitivity analysis, as well as the design of experiment (DOE) and response surface model (RSM) methods. The results of modal analysis based simulations were used for assessing the quality of the FEM model against the data measured during the experimental modal analysis of the scaled laboratory model for different support conditions. The sensitivity analysis, in turn, has provided opportunities for assessing the effect of individual FEM model parameters on the dynamic response of the examined supporting structure. The DOE and RSM methods allowed to determine the effect of model parameter changes on the supporting structure response.

Źródło:

Polish Maritime Research; 2017, S 1; 125-132
1233-2585

Pojawia się w:

Polish Maritime Research

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 47.

Tytuł:

The influence of osteoporotic bone structures of the pelvic-hip complex on stress distribution under impact load

Autorzy:

Arkusz, K.
Klekiel, T.
Niezgoda, T. M.
Będziński, R.

Powiązania:

https://bibliotekanauki.pl/articles/307484.pdf

Data publikacji:

2018

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

gęstość mineralna kości
BMD
osteoporoza
pelvic-hip complex
PHC
bone mineral density
finite element analysis
FEA
osteoporosis

Opis:

Purpose: The aim of this study was to determine the effect of bone mineral density (BMD) on the stress distribution in pelvic-hip complex (PHC) model which included bone structures and soft tissues. Bone mass changes in osteoporosis and osteopenia were considered in this analysis. In addition, the relations between force direction and stress distribution causing PHC fractures were determined. Methods: This paper presents the development and validation of a detailed 3D finite element model with high anatomical fidelity of the PHC and BMD changes in trabecular and cortical bones, modelled based on CT scans. 10 kN loading was induced on a model consisting of 8 ligaments, the pelvis, sacrum, femur in front and side directions. Results: For validation, the results of this model were compared to physiological stress in standing position and previous results with high-energy crashes under side impact load. Analysis of side-impact indicated the influence of BMD on femoral neck fractures, acetabular cartilage and sacroiliac joint delaminations. Front-impact analysis revealed the inferior pubic ramus, femoral neck fractures and soft tissue injuries, i.e., acetabular cartilage and symphysis pubis in osteoporosis and osteopenia. Conclusions: The elaborated PHC model enables effective prediction of pelvis injuries in high-energy trauma, according to Young-Burgess classification, and the determination of the influence of BMD reduction on pelvis trauma depending on force direction. The correlation between BMD and stress distribution causing varying injuries was determined.

Źródło:

Acta of Bioengineering and Biomechanics; 2018, 20, 1; 29-38
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 48.

Tytuł:

Three dimensional finite element analysis of a novel osteointegrated dental implant designed to reduce stress peak of cortical bone

Autorzy:

Zheng, L.
Yang, J.
Hu, X.
Luo, J.

Powiązania:

https://bibliotekanauki.pl/articles/306937.pdf

Data publikacji:

2014

Wydawca:

Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej

Tematy:

MES (metoda elementów skończonych)
implant
stomatologia
rozkład naprężeń
FEA
CT
dental implant
design
cervical cortex
stress distribution

Opis:

A new type of dental implant was designed as multi-component mainly including inset and abutment between which a gap was introduced to guide the force to transmit from the cancellous bone to cortical bone, with the intention to lower the stress peak at cortical bone. By the way of finite element analysis (FEA) associated with advanced computer tomography (CT) and 3D model reconstruction technology to construct precise mandible model, biomechanical aspects of implant were investigated. Compared with traditional implant that created stress dominantly at cortical bone, stress peak at the implant/bone interface in the cervical cortex decreased sharply (about 51%) for new type of implant. Furthermore, varying implant shape and gap dimensions to optimize the design of this new implant was performed. Optimization results revealed that: 1) screwed cylindrical implant is superior to tapered, stepped and smooth cylindrical implant in effectively decreasing the stress peak of bone; 2) deepening and widening gap would contribute to the decline of stress peak, but at the cost of break and destruction of the inset; 3) suitable gap size with the depth of 7mm and width of 0.3mm would be applicable. This work may provide reference forclinical application of dental implant.

Źródło:

Acta of Bioengineering and Biomechanics; 2014, 16, 3; 21-28
1509-409X
2450-6303

Pojawia się w:

Acta of Bioengineering and Biomechanics

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 49.

Tytuł:

Cross-border cooperation of enterprises: essence and significance

Autorzy:

Kuzmin, O.
Kravchenko, I.

Powiązania:

https://bibliotekanauki.pl/articles/411331.pdf

Data publikacji:

2014

Wydawca:

Polska Akademia Nauk. Oddział w Lublinie PAN

Tematy:

cross-border cooperation (CBC)
international entrepreneurship
foreign economic activity (FEA) of enterprises
cross-border cooperation of enterprises

Opis:

In the last decade the development of cross-border cooperation in the context of economic integration and internationalization processes becoming increasingly import ant for Ukraine, which follows the Western vector of integration. Systematic development of cross-border cooperation is not possible without considering all of its components and levels. The article highlights a vision of complicated economic phenomenon – the cross-border cooperation of enterprises, which combines the two important economic categories – cross-border cooperation and entrepreneurship by its self. There considered the fact that cross-border cooperation is an important tool for economic development and competitiveness increase of enterprises, located in border areas.

Źródło:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2014, 3, 2; 35-40
2084-5715

Pojawia się w:

ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

Tytuł:

Analytical and numerical investigation of the free vibration of functionally graded materials sandwich beams

Autorzy:

Bakhy, S.H.
Al-Waily, M.
Al-Shammari, M.A.

Powiązania:

https://bibliotekanauki.pl/articles/2175761.pdf

Data publikacji:

2021

Wydawca:

Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach

Tematy:

FGMs
sandwich beam
classical beam theory
vibration
FEA
frequency
ANSYS
belka warstwowa
klasyczna teoria belek
wibracje
częstotliwość

Opis:

Purpose: In this study, the free vibration analysis of functionally graded materials (FGMs) sandwich beams having different core metals and thicknesses is considered. The variation of material through the thickness of functionally graded beams follows the power-law distribution. The displacement field is based on the classical beam theory. The wide applications of functionally graded materials (FGMs) sandwich structures in automotive, marine construction, transportation, and aerospace industries have attracted much attention, because of its excellent bending rigidity, low specific weight, and distinguished vibration characteristics. Design/methodology/approach: A mathematical formulation for a sandwich beam comprised of FG core with two layers of ceramic and metal, while the face sheets are made of homogenous material has been derived based on the Euler–Bernoulli beam theory. Findings: The main objective of this work is to obtain the natural frequencies of the FG sandwich beam considering different parameters. Research limitations/implications: The important parameters are the gradient index, slenderness ratio, core metal type, and end support conditions. The finite element analysis (FEA), combined with commercial Ansys software 2021 R1, is used to verify the accuracy of the obtained analytical solution results. Practical implications: It was found that the natural frequency parameters, the mode shapes, and the dynamic response are considerably affected by the index of volume fraction, the ratio as well as face FGM core constituents. Finally, the beam thickness was dividing into frequent numbers of layers to examine the impact of many layers' effect on the obtained results. Originality/value: It is concluded, that the increase in the number of layers prompts an increment within the frequency parameter results' accuracy for the selected models. Numerical results are compared to those obtained from the analytical solution. It is found that the dimensionless fundamental frequency decreases as the material gradient index increases, and there is a good agreement between two solutions with a maximum error percentage of no more than 5%.

Źródło:

Archives of Materials Science and Engineering; 2021, 110, 2; 72--85
1897-2764

Pojawia się w:

Archives of Materials Science and Engineering

Dostawca treści:

Biblioteka Nauki

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