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Tytuł:
Numerical analysis of the behavior of compressed thin-walled elements with holes
Autorzy:
Różyło, P.
Wrzesińska, K.
Powiązania:
https://bibliotekanauki.pl/articles/102955.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thin-walled structures
numerical analysis
finite element method
openwork beam
stability of thin-walled profiles
Opis:
The study investigates thin-walled steel elements in a form of openwork beams with holes described by variable geometrical parameters. The specimens are modeled numerically and additionally subjected to axial compression in order to examine the critical and post-critical behavior of the thin-walled profiles. The models of profiles are propped articulatedly on the edges of the cross-section in the upper and lower parts. The numerical analysis investigates only the problem of non-linear stability of these structures. The FEM analysis is stopped at the moment when the compressed profiles achieve the yield stress in order to determine their loss of stability without undesired strains. The numerical computations are performed using the ABAQUS® program to investigate the impact of diameter variability in the thin-walled profiles with holes under allowable operational loads. The numerical investigation was performed only with respect to elastic work, ensuring the stability of thin-walled structures.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 31; 199-206
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of the effectiveness of the shot peening process for thin-walled parts based on the diameter of impressions produced by the impact of shot media
Autorzy:
Zaleski, K.
Bławucki, S.
Powiązania:
https://bibliotekanauki.pl/articles/103268.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
shot peening
thin walled parts
metal treatment
Opis:
The paper presents the results of studies on the effectiveness of the shot peening process for thin-walled parts based on the diameter of impressions produced by the impact of shot media. It is also described the current applications of this treatment for the thin-walled parts. The authors described an innovative measuring device which was used in the research. The material used in the studies was non-alloy steel C45. The relationships between beads diameter and thickness of workpieces on diameter of impression were presented.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 26; 77-82
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of machining strategies and technological history of semi-finished product on the deformation of thin-wall elements after milling
Autorzy:
Zawada-Michałowska, M.
Kuczmaszewski, J.
Pieśko, P.
Łogin, W.
Powiązania:
https://bibliotekanauki.pl/articles/103404.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
machining strategies
technological history
thin-walled elements
deformation
Opis:
The paper presents an analysis of the influence of machining strategy and the technological history of semi-finished product on the deformation of thin-walled elements made of aluminium alloy EN-AW 2024 after milling. As a part of this research work, five machining strategies are analysed. Additionally, the rolling direction of the plate (longitudinal and transversal) is taken into account as a technological history. During the research, the focus is set on the effects of the machining strategies i.e. HPC, HSM and conventional machining as well as their combinations on the post-machining stresses and deformations. Each of these strategies has a different range of technological parameters, which results in differences in machining efficiency and introduces post-machining stresses to the surface layer of the workpiece that vary in values and nature (i.e. compressive stresses or tensile stresses). The conducted study shows that larger deformations were obtained for transversal rolling direction in each analyzed case. The lowest deformation both for transversal and longitudinal rolling direction were achieved for the HSM and CM strategy.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 289-296
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
High-Performance Milling Techniques of Thin-Walled Elements
Autorzy:
Zawada-Michałowska, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2201768.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
milling
HPC
HSC
thin-walled elements
aluminium alloy
Opis:
The paper presents an overview of high-performance milling techniques of thin-walled elements. Currently, the tendency to simplify semi-finished products is used in aviation. In that case even 95% of semi-finished product mass is converted into chips, hence the increasing interest in such technol-ogies as: High Performance Cutting and High Speed Cutting. The aim of the paper was to research high-performance milling techniques of thin-walled elements in reference to conventional machin-ing. The material was the EN AW-7075 T651 aluminium alloy. A thin-walled pocket structure was designed and manufactured. The aspects related to geometric accuracy, surface quality and cutting time were analysed. On the basis of the obtained results, it was found that in case of geometric accu-racy related to the wall deformation, the greatest deformation was obtained after HPC, while the smallest one after HSC. The difference was over 400% (comparing HPC to HSC). A similar relation-ship was also received for the quality of the machined surface. Analysing the cutting time, the best result was achieved after HPC in reference to HSC and conventional machining. Taking into ac-count all analysed variables, the best solution was a combination of HPC and HSC. Thanks to the use of high-speed machining as a finishing, it is possible to receive high geometric accuracy and quality of the machined surface, while the application of HPC for roughing allows to shorten the cutting time, translating into an increase in the efficiency of the milling process. Conventional ma-chining is slightly less advantageous in terms of geometric accuracy and surface quality and it could possibly be used alternatively with High Speed Cutting, but its weakness is significantly lower effi-ciency compared to high-performance machining.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 3; 98--110
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of the critical state of thin-walled structure with Z-profile cross section
Autorzy:
Różyło, P.
Łukasik, D.
Powiązania:
https://bibliotekanauki.pl/articles/101904.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thin-walled structures
finite element method
composites
buckling
Opis:
The object of the study was a thin-walled profile with Z-shaped cross section made of the carbon-epoxy composite. The material model was prepared based on the implemented orthotropic properties. The purpose of the study was to determine the value of the critical load at which buckling occurs, the form of buckling and operating characteristics in critical condition. In order to achieve this numerical analysis were carried out. Additionally, the effects of the modification in arrangement of layers of the laminate to the stability and strength of thin-walled composite structures was presented. Numerical studies were carried out using commercial simulation software - ABAQUS®. Within the FEM research, both forms of buckling and the associated critical load, dependent on the configuration the layers of the composite were achieved. The analysis of the obtained results allowed the evaluation of the structure’s work in relation to the level of energy consumption or rigidity estimation. In the paper only numerical simulations of the critical state were conducted.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 1; 194-200
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Draft JIG structure design for measuring deformation of thin-walled robotic or conveyor components
Autorzy:
Michalik, Peter
Zajac, Jozef
Straka, Ľuboslav
Nowakowski, Lukasz
Ambrozy, Martin
Powiązania:
https://bibliotekanauki.pl/articles/102263.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thin-walled
robotic
conveyor
cienkie ściany
robot
transporter
Opis:
The paper presents the general function, the division and the description of the main jig parts. It gives account of the basics and principles of a measuring jig structure using CAD applications. The main part delves into design of individual measurement jig options for measuring deformations of thin-walled robotic and conveyor components. Tension and stress analyses for each option have been performed. Subsequent to stress analysis, a suitable option was selected, with a description of its main parts, the production process and the necessary production equipment. Finally, the jig produced for the purpose of measuring deformation of thin-walled robotic and conveyor components is presented.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 3; 55-60
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thin-walled cross section shape influence on steel member resistance
Autorzy:
Urbańska-Galewska, E.
Deniziak, P.
Gordziej-Zagórowska, M.
Łukowicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/102617.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
steel structures
thin-walled elements
efficient shape research
Opis:
This work describes why trending thin-walled technology is achieving popularity in steel construction sector. A purpose of this article is to present the influence of the cold-formed element cross-section shape on an axial compression and a bending moment resistance. The authors have considered four different shapes assuming constant section area and thickness. Calculations were based on three different steel grades taking into account local, distortional and overall buckling. The results are presented in a tabular and a graphical way and clearly confirm that cross-section forming distinctly impact the cold-formed member resistance. The authors choose these cross-sections that work better in compression state and the other (those slender and high) that function more efficiently are subjected to bending.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 29; 41-45
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Classification of restraints in the optimization problem of a cold-formed profile
Autorzy:
Łukowicz, A.
Urbańska-Galewska, E.
Deniziak, P.
Gordziej-Zagórowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/102933.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
steel structures
thin-walled elements
cold-formed sections
Opis:
This work describes the restraints in the optimization problem. This is an important and complicated issue because it requires taking into account a vast range of information related to the design and production. In order to describe the relations of a specific optimization problem, it is essential to adopt appropriate criteria and to collect information on all kinds of restraints, i.e. boundary conditions. The following paper verifies the various restraints and defines three subsets: design assumptions, technological limitations and standard conditions. The provided classification was made with reference to the analysis of the construction applicability of the newly patented cold-formed profile.
Źródło:
Advances in Science and Technology. Research Journal; 2015, 9, 28; 61-67
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Research in the Aspect of Determining the Mechanical and Strength Properties of the Composite Material Made of Carbon-Epoxy Composite
Autorzy:
Różyło, Patryk
Smagowski, Wojciech
Paśnik, Jakub
Powiązania:
https://bibliotekanauki.pl/articles/2201915.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
material properties
laminates
strength testing
thin-walled composite structures
Opis:
The present paper, provides a study of conducting experimental investigations (based on the ISO standards), in the context of determining material properties (mechanical and strength parame-ters) in the case of thin-walled composite structures - made of carbon-epoxy composite. Tests were carried out on 5 different types of test specimens (in accordance with the standards), with a minimum of 9 specimens per each type of test. The tests provided high repeatability of results, and the large number of test specimens per each test made it possible to precisely average the test results in terms of determining the necessary material properties. The tests were carried out using a Zwick Z100 universal testing machine (UTM), under room temperature conditions, using two types of test heads that allow static experimental tests. The results presented in this paper con-stitute a prelude to research within the framework of the project from the National Science Centre (Poland) with the number 2021/41/B/ST8/00148. The paper presents the initial stage of the im-plementation of the aforementioned project - which was the determination of material parameters of the composite material from which the target thin-walled composite structures with closed sections were made.
Źródło:
Advances in Science and Technology. Research Journal; 2023, 17, 2; 232--246
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of eccentricity of load on critical force of thin-walled columns CFRP
Autorzy:
Wysmulski, P.
Kráľ, J.
Powiązania:
https://bibliotekanauki.pl/articles/102239.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
finite element method
buckling
eccentricity load
thin-walled structures
laminate
composite CFRP
Opis:
The subject of study was a thin-walled C-section made of carbon fiber reinforced polymer (CFRP). Column was subjected to eccentric compression in the established direction. In the computer simulation, the boundary conditions were assumed in the form of articulated support of the sections of the column. Particular studies included an analysis of the effects of eccentricity on the critical force value. The research was conducted using two independent research methods: numerical and experimental. Numerical simulations were done using the finite element method using the advanced system Abaqus®. The high sensitivity of the critical force value corresponding to the local buckling of the channel section to the load eccentricity was demonstrated.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 109-113
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the manufacturing possibility of thin-walled robotic portals for conveyance workplaces
Autorzy:
Michalik, Peter
Dobranský, Jozef
Hrabovský, Leopold
Petruš, Michal
Powiązania:
https://bibliotekanauki.pl/articles/102021.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
robotic
thin-walled
CNC machine center
CAM application
cienkie ściany
centrum maszyn CNC
aplikacja CAM
Opis:
The paper discusses evaluation of machining solutions for oversized thin-walled robotic portal component for conveyance workplaces. The following portal CNC machining centers have been selected. Firstly, a FSGC 300 “portal type” portal was proposed, with a 50000 mm “X” axis and Heidenhain control system, the second portal was a DMU 340 portal with the maximum axis “X” of 6000 mm and Siemens Sinumerik control system and the last portal was the VF-10 / 40 one, with the maximum axis “X” of 3048 mm and Fanuc control system. Further, the method of fixing a thin-walled robotic portal is designed and individual options are evaluated for their economy. The CAM software application used for programming the production was SolidWorks.
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 1; 338-345
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Surface roughness of thin-walled components made of aluminium alloy EN AW-2024 following different milling strategies
Autorzy:
Kuczmaszewski, J.
Pieśko, P.
Zawada-Michałowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/102470.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
machining of aluminium alloys
surface roughness
High Speed Cutting
High Performance Cutting
thin-walled components
Opis:
The paper presents an analysis of surface roughness following milling of thin-walled components made of aluminium alloy EN AW-2024, taking into account the three different machining strategies and rolling direction of semi-finished product in the form of a plate combined with the milling feed. The aims of the study were to compare the results of machining using various technologies and show the best of them, providing the smallest roughness of the component following milling, as well as to determine the impact of rolling direction of the plate on the quality of the end surface. Measurement results of surface roughness parameters were provided information about the progress of the machining process.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 30; 150-158
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental Research of the Weakening of the Fuselage Skin by RFSSW Single Row Joints
Autorzy:
Kubit, Andrzej
Bucior, Magdalena
Kluz, Rafał
Bochnowski, Wojciech
Perłowski, Ryszard
Powiązania:
https://bibliotekanauki.pl/articles/102400.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
RFSSW
welding
thin-walled structures
pressurization
microstructure analysis
spawanie
struktury cienkościenne
zwiększanie ciśnienia
analiza mikrostruktury
Opis:
The paper presents the results of experimental investigations, the aim of which was to determine the degree of weakening of skin sheet of the thin-walled structure through a single-row welded joints made by Refill Friction Stir Spot Welding (RFSSW) technology. At the beginning, a short metallographic analysis of the weld was carried out, defining the characteristic areas of the microstructure. Then, comparative tests were carried out on the thin-walled structure sample in the form of a single-row skin-stringer joint. The structures made with the discussed technology of welding were compared with the traditionally joined structure by riveting. It has been shown that in the case of the welded structure, the skin sheet is weakened by more than 6% to a lesser extent than in the case of riveted. However, it was shown that the cracking path in the tensiled welded sheet runs along an unpredictable path, deviating from the line marked by the welds’ row. While in the case of riveted joint the cracking propagation along the row of rivets was revealed. The analyzes of fracture surfaces for both cases using scanning electron microscopy were also undertaken, thus undertaking preliminary considerations on the mechanism of fracture.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 3; 90-97
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Neural Networks in Crashworthiness Analysis of Thin-Walled Profile with Foam Filling
Autorzy:
Rogala, Michał
Powiązania:
https://bibliotekanauki.pl/articles/103402.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
energy dissipation
thin-walled structure
aluminium foam
energy absorption
rozpraszanie energii
konstrukcja cienkościenna
pianka aluminiowa
pochłanianie energii
Opis:
This article presents the numerical tests of thin-walled compressed columns with a square cross-section. The crush efficiency indicators were determined using the finite element method (Abaqus) and neural networks of MLP. The models had a constant circular trigger, with a diameter of 32 mm. During dynamic analysis, the samples were loaded with 1700 J. The numerical models were filled with aluminum foam from 40 mm to 180 mm every 20 mm. The study presents the conclusions for the thin-walled models with crushable foam.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 3; 93-99
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
On the Identification of Local Structural Defects in Composite Thin-Walled Structures
Autorzy:
Kopecki, Henryk
Święch, Łukasz
Kołodziejczyk, Radosław
Powiązania:
https://bibliotekanauki.pl/articles/102666.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thin-walled structures
composite structures
embedded strain gauge
modal analysis
konstrukcje cienkościenne
konstrukcje kompozytowe
tensometr osadzony
analiza modalna
Opis:
The presented work considers the issue of the usefulness of alternative methods aimed at quickly and effectively identifying the local damage to the thin-walled composite load-bearing structures. Two ways of identifying destruction were considered, based on the assumption that the damage that occurs during operation causes local changes in the system rigidity. The first method is based on strain gauges. It consists of embedding strain gauges in the structure at the stage of composite production and monitoring of deformation during its life cycle. The second of the concepts under consideration is based on modal analysis, carried out using a modal hammer. On the example of the plate band, experimental studies supported by numerical analysis were carried out. The obtained research results and numerical analyses allowed for the formulation of a number of conclusions, mainly in terms of focusing on further research.
Źródło:
Advances in Science and Technology. Research Journal; 2020, 14, 1; 154-166
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 19

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