Temat: finite elements analysis - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Computer Aided Design and Structural Analysis of the Endoprosthesis of the Knee Joint
Autorzy:: Zubrzycki, J.
Karpiński, R.
Górniak, B.
Powiązania:: https://bibliotekanauki.pl/articles/118225.pdf
Data publikacji:: 2016
Wydawca:: Polskie Towarzystwo Promocji Wiedzy
Tematy:: knee joint
endoprosthesis
finite elements analysis
Opis:: The paper presents results of the preliminary structural analysis of model of the endoprosthesis of the knee joint. Basics of anatomy and biomechanics of the knee joint were introduced. Based on data from computed tomography, the model of knee joint was constructed. The prototype of the endoprosthesis of the knee joint was designed. After determining physical properties of structural materials, the Finite Elements Analysis of the model was conducted under various load conditions. Finally the results of analysis are presented.
Źródło:: Applied Computer Science; 2016, 12, 2; 84-95
1895-3735
Pojawia się w:: Applied Computer Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Finite Elements Strenght Analysis of a Compressor Consisting of Four Helical Rotors
Autorzy:: Nieoczym, Aleksander
Szklarek, Karol
Powiązania:: https://bibliotekanauki.pl/articles/102611.pdf
Data publikacji:: 2018
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: modal analysis
finite elements analysis
rotary-screw
compressor
analiza modalna
analiza elementów skończonych
śruba obrotowa
sprężarka
Opis:: The present article reports the results of tests of a compressor consisting of four helical rotors. Finite element strength analysis of rotors with varied screw thread pitch was performed. The analysis allowed us to determine the stress-strain state of the rotor material and deformation of rotors as an effect of loads generated during operation of the compressor. The analysis also made it possible to calculate the frequencies of the free vibrations of the rotors.
Źródło:: Advances in Science and Technology. Research Journal; 2018, 12, 1; 1-8
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Distribution of forces on supporting teeth in the midpalatal expander during “Hyrax” screw pre-load
Autorzy:: Młynarek, K.
Żmudzki, J.
Powiązania:: https://bibliotekanauki.pl/articles/366987.pdf
Data publikacji:: 2019
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: rapid palatal expansion
Hyrax screw pre-load
stress
displacement
finite elements analysis
FEA
szybka ekspansja podniebienia
naprężenie
przemieszczenie
analiza elementów skończonych
Opis:: Purpose: The aim of the study was to determine forces which are transferred to supporting teeth during the treatment with the midpalatal device with Hyrax screw and to evaluate orthodontic and orthopaedic effects based on displacement analysis. Design/methodology/approach: The finite element method (FEM) was used to simulation the midpalatal expansion forces activated by the screw pre-loaded during a turn of 180° which corresponds to daily recommended value. Distribution of expansion forces of Hyrax device was calculated as reaction forces on elastic supports with stiffness corresponding to the teeth working on periodontal ligament in alveolar bone. Findings: On the basis of the displacement analysis was observed the movement of supporting teeth by a value higher than 0.1 mm which corresponds to the recommended daily value. The midpalatal suture splitting forces were determined on the first premolars with a value of 32.8 N and on the first premolars of 44.2 N. Research limitations/implications: The studies did not take into account the shape of palate other craniofacial bones and their stiffness. Practical implications: Adjusting the stiffness of the device to degree of ossification midpalatal suture and teeth mobility. Searching for new solutions which eliminate the negative phenomenon of tilting teeth during the expansion of maxilla and recommending a surgically assisted techniques. Originality/value: The simulation confirmed that treatment with Hyrax screw gives a uniform expansion with values of forces corresponded to stiffness of premolar and molar teeth. The studies have indicated a possibility of tendency to tilting the supporting teeth what is a negative phenomenon.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2019, 93, 1-2; 26-31
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: The effect of protrusions on the initiation of partial discharges in XLPE high voltage cables
Autorzy:: AlShaikh Saleh, Mohammad
Refaat, Shady S.
Olesz, Marek
Abu-Rub, Haitham
Guziński, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/2090691.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: FEA
finite elements analysis
protrusions
XLPE
water trees
partial discharge
void
space charge
stress enhancement factor
analiza elementów skończonych
kable XLPE
polietylen kablowy
polietylen sieciowany
wyładowanie niezupełne
ładunek przestrzenny
Opis:: This paper is focusing on 3D Finite Elements Analysis (FEA) based modelling of protrusions as defects or imperfections in the XLPE high voltage cable. This study is aiming to examine the impact protrusions have on the initiation of partial discharges. Spherical and ellipsoidal protrusions with different sizes at the conductor screen of the high voltage cable is an essential content of this paper. In addition, a spherical gas-filled void is placed inside and outside the protrusions, and a water tree produced from protrusions is under consideration. The partial discharge influence taking place at the protrusions and the stress enhancement factor is determined for all the variations mentioned to quantify the rise in the inception of partial discharges due to the protrusions.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; e136037, 1--9
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: The effect of protrusions on the initiation of partial discharges in XLPE high voltage cables
Autorzy:: AlShaikh Saleh, Mohammad
Refaat, Shady S.
Olesz, Marek
Abu-Rub, Haitham
Guziński, Jarosław
Powiązania:: https://bibliotekanauki.pl/articles/2173562.pdf
Data publikacji:: 2021
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: FEA
finite elements analysis
protrusions
XLPE
water trees
partial discharge
void
space charge
stress enhancement factor
analiza elementów skończonych
kable XLPE
polietylen kablowy
polietylen sieciowany
wyładowanie niezupełne
ładunek przestrzenny
Opis:: This paper is focusing on 3D Finite Elements Analysis (FEA) based modelling of protrusions as defects or imperfections in the XLPE high voltage cable. This study is aiming to examine the impact protrusions have on the initiation of partial discharges. Spherical and ellipsoidal protrusions with different sizes at the conductor screen of the high voltage cable is an essential content of this paper. In addition, a spherical gas-filled void is placed inside and outside the protrusions, and a water tree produced from protrusions is under consideration. The partial discharge influence taking place at the protrusions and the stress enhancement factor is determined for all the variations mentioned to quantify the rise in the inception of partial discharges due to the protrusions.
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 1; art. no. e136037
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: FEM numerical simulation of contact stresses between driving shaft and hub impeller of fuel pump
Autorzy:: Wiater, M.
Chladek, G.
Żmudzki, J.
Powiązania:: https://bibliotekanauki.pl/articles/2201038.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:: fibre reinforcement composite
fuel pump
impeller
shaft
hub wear
contact stress
finite elements analysis
FEA
kompozyty wzmocnione włóknami
pompa paliwa
wirnik
wał
zużycie piasty
naprężenia kontaktowe
analiza elementów skończonych
Opis:: Purpose: The aim of the work was to test the contact stresses in the model system of the turbine hub cooperating with the fuel pump drive shaft. The hypothesis of the work was that, by means of FEA, it is possible to assess the contact stresses in the materials of the turbine hub and the fuel pump shaft during torque transmission. Design/methodology/approach: A turbine with fibre-reinforced polyphenylene sulphide (PPS) composite cooperating with a stainless steel shaft (X46Cr13/1.4034) in a commonly used D-flat shape joint was selected for the experimental research. To assess contact stresses, the CAD model (NX, Siemens) of the entire turbine was limited to the hub area. The drive shaft is supported in accordance with the bearing in the fuel pump, and the possibility of rotation about the axis along the length of the torque-producing magnet is taken away. The system was loaded with a torque of 200 Nmm on the turbine. The turbine hub and shaft were calculated, taking into account the phenomenon of contact detachment or slip at the value of the friction coefficient of 0.1. Findings: The pressure transmission area was found in the area at the edge of the flat surface D-flat and on the opposite side of the D-convexity. The contact stresses on the D-flat side reached values close to the composite strength. Research limitations/implications: The studies did not take into account the technological inaccuracies, thermal deformation, local material properties, and wear. The value of the friction coefficient was not measured in realistic conditions with fuel lubrication. Practical implications: FEA has been achieved, which allows to reduce the cost of experimental research. Originality/value: The proposed model allows for further studies of the influence of elasticity of various materials and structures on contact stresses in order to assess wear resistance.
Źródło:: Journal of Achievements in Materials and Manufacturing Engineering; 2022, 113, 1; 13--21
1734-8412
Pojawia się w:: Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Engineering Analysis Application in Furniture Making : Deformation – Equivalent Stress
Autorzy:: Seker, Sedanur
Koc, Kucuk Huseyin
Powiązania:: https://bibliotekanauki.pl/articles/27323524.pdf
Data publikacji:: 2023
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Technologii Drewna
Tematy:: finite elements
furniture
engineering analysis
deformation
stress
wood
Opis:: The deformation of furniture units plays a significant role in their effective and efficient way of use during the overall service life. Accurate information on the deformation of different types of furniture members can be determined and evaluated by current testing methods. However, this will not only be expensive but also destructive. Therefore, the objectives of this study were to obtain initial data to predict the types and magnitudes of deformation which take place in various furniture works due to certain stress distribution. Such predictions were carried out by employing engineering analysis within the scope of the statistical approach. AutoCAD and SolidWorks software were used to design the furniture while the ANSYS finite element program route was employed for engineering analysis in this work. The joint types and stresses were applied as follows: dowel type joints having an equivalent stress level ranging from 0.20-0.96 MPa and a deformation level ranging from 0.0010.82 mm; mortise and tenon joints having an equivalent stress level ranging from 0.17-2.68 MPa, deformation level ranging from 0.02-0.17 mm. Minifix type joints having an equivalent stress level ranging from 0.07-17.6 MPa, and a deformation level ranging from 0.03-1.42 mm. It appears that the engineering tools used in this study can successfully be applied to determine the deformation behaviors of furniture units.
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2023, 66, 211; Art. no. 1644-3985.406.07
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Numerical-experimental analysis of the post-buckling state of a multi-segment and multi-member thin-walled structure subjected to torsion
Numeryczno-eksperymentalna analiza stanu deformacji zakrytycznej wielosegmentowej, wielopodłużnicowej konstrukcji cienkościennej poddanej skręcaniu
Autorzy:: Kopecki, T.
Powiązania:: https://bibliotekanauki.pl/articles/280895.pdf
Data publikacji:: 2011
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: shell
nonlinear analysis
finite elements
constrained torsion
buckling
Opis:: A three-segment ten-member thin-shell structure with flat walls made of a material with an instantaneous characteristic approximated by means of an ideally elastic-plastic material model is considered. The structure material (polycarbonate) demonstrates the temporary double refraction effect in polarized light. The system is subject to twisting resulting in the state of local post-critical deformation of skin segments within the structure area. As a result of non-linear numerical analysis in the course of which conformance of equilibrium paths obtained numerically and by means of the experiment is assured, the stress field is determined taking into account the flexural and membrane state of the structure.
Rozważano trzysegmentową, dziesięciopodłużnicową strukturę cienkościenną o ściankach płaskich, wykonaną z materiału o charakterystyce natychmiastowej przybliżanej modelem materiału idealnie sprężysto-plastycznego. Materiał konstrukcji (poliwęglan) wykazuje efekt dwójłomności wymuszonej w świetle spolaryzowanym. Konstrukcję poddawano skręcaniu, wskutek czego w obszarze struktury pojawiał się stan lokalnej deformacji zakrytycznej segmentów pokrycia. W wyniku nieliniowej analizy numerycznej, w trakcie której zachowywano zgodność ścieżek równowagi otrzymanych na drodze numerycznej oraz badań eksperymentalnych, wyznaczano pole naprężeń, uwzględniające stan giętny i błonowy ustroju.
Źródło:: Journal of Theoretical and Applied Mechanics; 2011, 49, 1; 227-242
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Selected Methods of Obtaining Adequate Forms of Deformation of Supercritical Thin-Walled Flat Plates
Autorzy:: Kopecki, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/2024021.pdf
Data publikacji:: 2021
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: finite elements method
nonlinear analysis
advanced deformation
isogrid
Opis:: The study includes considerations on the numerical methods of obtaining the correct forms of deformation of thin-walled plates subjected to pure shear, operating under conditions of critical loads. Selected methods were presented and subjected to comparative tests, allowing for the obtaining of a state of large deformations of a perfectly flat system, loaded in its plane. These methods are based on application various forms of initial imperfections into the system, either geometrically or physically. A new solution was proposed in this area, differing in its essence from most commonly used solutions.
Źródło:: Advances in Science and Technology. Research Journal; 2021, 15, 2; 184-190
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Determination of the Geometric Properties of a Jet Engine Fan Blades Based on Modal Vibration Testing
Autorzy:: Osiewicz, Maciej
Cieślak, Sławomir
Bielecki, Marcin
Powiązania:: https://bibliotekanauki.pl/articles/36778970.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Lotnictwa
Tematy:: blade vibration
modal analysis
finite elements
design
aviation
Opis:: The article presents an experimental method of determining the geometric properties of jet engine rotor airfoils based on modal vibration testing. The procedure is based on adjusting the results of analytical calculations to the laboratory outcomes. Experimental tests were carried out on a set of 20 jet engine fan blades made of AL7022-T6 aluminium alloy. Each blade differed in weight and geometric dimensions within the accepted design tolerance. Numerical analysis of five airfoils that differed in thickness was performed. Modal vibration test results were summarised and compared with the results obtained by the numerical method. The comparison revealed a high similarity of the frequency and form of vibrations acquired by numerical simulation for each of the blades in relation to the executed vibration testing. Based on the verification of the theoretical model with the results obtained through experimental testing, conclusions were drawn about the object’s dynamic behaviour and its technological quality and geometric properties, whereby each of airfoil was probably thinned.
Źródło:: Transactions on Aerospace Research; 2022, 3 (268); 56-74
0509-6669
2545-2835
Pojawia się w:: Transactions on Aerospace Research
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 11.

Tytuł:: Laminar mixing flow in a stirred vessel
Autorzy:: Egidi, N.
Misici, L.
Piergallini, R.
Powiązania:: https://bibliotekanauki.pl/articles/1964081.pdf
Data publikacji:: 2001
Wydawca:: Politechnika Gdańska
Tematy:: mixing flow
laminar mixing flow
viscous liquids
finite elements
finite element analysis
finite element method
Opis:: Using finite element method we study the transient motion of fluid particles in a 3D cavity, when the fluid is incompressible viscous and with uniform density. The fluid is mixed under the action of four-blades turbine that is simulated by a velocity function. The mixing quality of the fluid is studied qualitatively, by visualization, and quantitatively, by measuring the indices of diffusion and dispersion.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 1; 71-83
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 12.

Tytuł:: Numerical analysis of impact load of arch yielding support
Autorzy:: Tokarczyk, J.
Turewicz, K.
Smolnik, G.
Rotkegel, M.
Powiązania:: https://bibliotekanauki.pl/articles/243887.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: virtual prototyping
finite elements method
mining
impact analysis
experimental test
Opis:: Bumping is one of the natural hazards that occur in Polish collieries. It is a common phenomenon but difficult to predict and very often it causes huge losses in mining equipment and roadway structure. Death of miners working underground is most severe result of bumping. To reduce or even to eliminate results of bumping, especially fatal cases, many safety measures have been used. Frame of arch support is one of the measures applied to reduce dangerous results of bumping. Simulation test ofimpact load of arch yielding support was presented in the paper. The simulation of support load was realized in two stages. Static load of frame of yielding arch support was simulated at the first stage. Among others simulation of assembly of arch support components was carried out. Non-linear simulation, including contact phenomena, was conducted for that purpose. First stage of the task was realized in MSC.Marc/Mentat software Structure of yielding arch support was dynamically loaded at the second stage. The forcing corresponded to real dynamic loads that werefound in mine workings. Second stage of the task was realized in MSC.Dytran software The results of simulations carried out at the KOMAG Institute of Mining Technology were compared with the results of tests of arch supports, which were realized at the Central Mining Institute.
Źródło:: Journal of KONES; 2010, 17, 1; 455-464
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 13.

Tytuł:: Methodology for the Composite Tire Numerical Simulation Based on the Frequency Response Analysis
Autorzy:: Karpenko, Mykola
Skačkauskas, Paulius
Prentkovskis, Olegas
Powiązania:: https://bibliotekanauki.pl/articles/24200834.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne PAN
Tematy:: tire
composite
finite elements metod
frequency analysis
numerical simulation
optimization
Opis:: Reliability and maintenance analysis in transport focus on the main objective of accident and incident investigations that benefit to better understanding of the causes of accidents and prevention of them in the future. The conducted research presents theoretical and experimental research on composite pneumatic tire used in transport engineering. The approach of the numerical simulation sequence which is offered in this research facilitates engineers in efficient determination of the dynamic properties and behaviour of vehicle tire at design stage. The tire materials have been tested by employing piezoelectric micro-vibration tests and frequency analyses. The Finite Element Method used for numerical simulation in combination with experimental measurements based on optimization by material frequency response, was applied in modelling tire material behaviour avoiding problems of composite structure modelling. The obtained results indicate that the offered methodology can be used in numerical simulation of composite tire investigation and considering material viscos-elastic properties.
Źródło:: Eksploatacja i Niezawodność; 2023, 25, 2; art. no. 163289
1507-2711
Pojawia się w:: Eksploatacja i Niezawodność
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 14.

Tytuł:: Seismic analysis of Fractured Koyna Concrete Gravity Dam
Autorzy:: Ouzandja, Djamel
Messaad, Mokhtar
Berrabah, Amina T.
Belharizi, Mohamed
Powiązania:: https://bibliotekanauki.pl/articles/31340453.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Instytut Budownictwa Wodnego PAN
Tematy:: fractured dam
contact elements
finite element method
failure
Lagrangian approach
seismic analysis
Opis:: Seismic analysis of a fractured dam is a generally complex problem. This paper presents an earthquake behavior investigation of a fractured concrete gravity dam considering dam-reservoir-foundation rock interaction. The Koyna dam profile, located in India, is adopted in this study. The nonlinear finite element analyses are conducted taking into account empty and full reservoir cases, to exhibit the hydrodynamic effect of reservoir water on the dam earthquake response. The hydrodynamic pressure is modeled by fluid finite elements based on a Lagrangian approach. Transient analyses take into account material and connection nonlinearity. Drucker-Prager model is employed in nonlinear analyses for the dam concrete and foundation rock. The structural crack between the top and bottom blocks of the dam is presented by surface-to-surface contact elements based on Coulomb’s friction law in order to simulate the behavior of contact joints and deformation of blocks. The distribution of horizontal displacements and principal stresses along the dam height is investigated for empty and full reservoir cases.The failure processes of two potential failure modes of cracked dam, i.e, the separation and sliding of top block during an earthquake, are examined.
Źródło:: Archives of Hydro-Engineering and Environmental Mechanics; 2023, 70, 1; 29-47
1231-3726
Pojawia się w:: Archives of Hydro-Engineering and Environmental Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 15.

Tytuł:: Numerical Analysis of the Impact of Geometric Parameters of the Outcuts in the Wing Torsion Box Wall on the Mechanical Properties of the Structure
Autorzy:: Kopecki, Tomasz
Powiązania:: https://bibliotekanauki.pl/articles/2201747.pdf
Data publikacji:: 2022
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: outcut
advanced deformation
finite elements method
FEM
nonlinear analysis
wing torsion box
wing
aircraft construction
Opis:: The study presents the results of comprehensive numerical analyses of an unusual solution in the field of geometry of holes in the wall of the wing torsion box subjected to torsion. Due to the nature of loads acting on the wing structure in flight conditions, it is possible to modify the current standard solutions. However, this involves a fundamental change in the nature of stress distribution and the resulting need to use new types of local reinforcements of the structure. The analyses were supposed to indicate the dependencies between the geometric parameters of the outcuts and the nature of advanced deformations and the distribution of internal forces.
Źródło:: Advances in Science and Technology. Research Journal; 2022, 16, 3; 176--182
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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