Temat: finite deformation - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Numerical simulations of arteries with an adaptive finite element method
Autorzy:: Fuksa, A. K.
Rachowicz, W.
Powiązania:: https://bibliotekanauki.pl/articles/280674.pdf
Data publikacji:: 2014
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: computational biomechanics
finite element method
adaptivity
error estimation
finite deformation
Opis:: This paper presents applications of the adaptive FEM in computational biomechanics. The study involves finite deformation of artery walls built of layers of elastic, nearly incompressible (rubber-like) materials. The models are reinforced with nearly inextensible collagen fibres stretched along the directions close to the circumferential direction. A Total Lagrangian technique based on the displacement-pressure formulation is presented. Residual error estimates and finite element mesh adaptation strategies are developed. The procedures are illustrated for solutions of arteries under various load considerations.
Źródło:: Journal of Theoretical and Applied Mechanics; 2014, 52, 4; 917-925
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Influence of the crack tip model on results of the finite elements method
Wpływ modelu wierzchołka pęknięcia na wyniki uzyskane metodą elementów skończonych
Autorzy:: Graba, M.
Gałkiewicz, J.
Powiązania:: https://bibliotekanauki.pl/articles/281432.pdf
Data publikacji:: 2007
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: fracture mechanics
finite deformation
stress distribution
J integral
CTOD
finite elements method
Opis:: The paper contains recommendations of finite element models of the crack tip neighborhood to obtain results independent of the finite element mesh. The recommendations are valid for elastic-plastic problems and finite strains. As an example, analysis of single edge notched specimens under bending is presented.
W pracy przeprowadzono analizę wpływu modelu MES na wartość naprężeń przed frontem pęknięcia w materiałach sprężysto-plastycznych, wyznaczaną w sposób numeryczny wartość całki J oraz rozwarcie wierzchołka pęknięcia (RWP). Obliczenia prowadzono dla płaskiego stanu odkształcenia przy założeniu dużych odkształceń.
Źródło:: Journal of Theoretical and Applied Mechanics; 2007, 45, 2; 225-237
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Distribution of crack-tip stresses during fatigue loading with an overload event: role of initial crack-tip shape, plastic compressibility and material softening
Autorzy:: Pandey, Satyabrat
Khan, Debashis
Alam, Intaf
Powiązania:: https://bibliotekanauki.pl/articles/1839711.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: fatigue loading
finite deformation
mode-I crack
stress/strain field
plastically compressible solid
material softening
Opis:: This paper deals with the influence of initial crack-tip shape, plastic compressibility and material or strain softening on near-tip stress-strain fields for mode I crack when subjected to fatigue loading with an overload event under plane strain and small scale yielding conditions. A finite strain elastic-viscoplastic constitutive equation with a hardening-softening- -hardening hardness function is taken up for simulation. For comparison, a bilinear hardening hardness function is also considered. It has been observed that the near-tip crack opening stress yy, crack growth stress xx, and hydrostatic stresses are noticeably controlled by the initial crack tip shape, plastic compressibility, material softening as well as the overload event. The distribution pattern of different stresses for a plastically compressible hardening- -softening-hardening solid appears to be very unusual and advantageous as compared to those of traditional materials. Therefore, the present numerical results may guide material scientists/engineers to understand the near-tip stress-strain fields and growth of a crack in a better way for plastically compressible solids, and thus may help to develop new materials with improved properties.
Źródło:: Journal of Theoretical and Applied Mechanics; 2021, 59, 2; 239-250
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: An analysis on the effect of crosscuts within shaft protective pillars on deformations of the surrounding rock mass deformations
Autorzy:: Warchala, Ewa
Szostak-Chrzanowski, Anna
Powiązania:: https://bibliotekanauki.pl/articles/1402313.pdf
Data publikacji:: 2020
Wydawca:: Politechnika Wrocławska. Wydział Geoinżynierii, Górnictwa i Geologii. Instytut Górnictwa
Tematy:: finite elements method
stress
protective pillar
deformation
Opis:: The development of crosscuts within mining shafts’ protective pillars causes a change of state of stress in the surrounding rock mass. It also causes deformations of the rock mass and the surface. It is essential to conduct prediction analysis of the deformations and stresses in order to secure a proper functioning of a shaft located within the protective pillar. It is recommended that the analysis should be based on the integration of the finite element method (FEM) and geodetic monitoring results. FEM makes it possible to determine the rock mass stresses and displacements in the shaft protective pillars and in the surrounding rock mass. It makes is possible to determine the safety and proper functioning of the shaft. The results of the FEM analysis of the impact of crosscuts and mining activities on rock mass deformations inside and on the surface of the protective shaft pillar are presented. The influence of mining extractions was investigated. The mining panels were located around the safety pillar in three regions NW, SE and SW and the crosscut were located within the safety pillar. The presented methodology will allow for the determination of the deformations and strains in case of farther development of crosscuts within the protective shaft pilar and by planned mining activities around the pillar.
Źródło:: Mining Science; 2020, 27; 253-265
2300-9586
2353-5423
Pojawia się w:: Mining Science
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

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: 6.

Tytuł:: Static gradient damage simulations using stabilized finite elements
Gradientowy model do statycznych symulacji uszkodzenia przy użyciu elementow skończonych ze stabilizacją
Autorzy:: Pamin, J.
Wosatko, A.
Powiązania:: https://bibliotekanauki.pl/articles/280411.pdf
Data publikacji:: 2012
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: gradient damage
stabilized finite elements
localization of deformation
Opis:: The hourglass control of two-field finite elements for the coupled problem of gradient damage is analyzed. For the equilibrium equations, stabilization is introduced according to the leastsquare method. For the additional averaging equation, three proposals of stabilization are considered, however only the operator method performs well. Attention is focused on the formulation, implementation and spectral analysis of four-noded elements in two-dimensional simulations. Basic benchmarks of a tensile bar with an imperfection and a beam in four-point bending are computed and discussed.
W artykule przedstawiono dwupolowe elementy skoczone z kontrolą pasożytniczych form deformacji, sformułowane dla sprzężonego problemu gradientowej mechaniki uszkodzenia. Zastosowano stabilizację rownań równowagi zgodnie z metodą najmniejszych kwadratów. Rozpatrzono trzy warianty stabilizacji dodatkowego równania uśredniającego, z których tylko metoda wykorzystująca operator γ jest skuteczna. Uwaga została skupiona na wyprowadzeniu, implementacji i analizie spektralnej czterowęzłowego elementu do symulacji dwuwymiarowych. Przedyskutowano wyniki uzyskane dla podstawowych testów rozciąganego pręta z imperfekcją i belki czteropunktowo zginanej.
Źródło:: Journal of Theoretical and Applied Mechanics; 2012, 50, 3; 841-853
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

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: 8.

Tytuł:: Deformation of rubber-metal vibration and seismic isolators
Deformirovanie rezinometallicheskikh vibrosejjsmoizoljatorov
Autorzy:: Kozub, Y.
Powiązania:: https://bibliotekanauki.pl/articles/792842.pdf
Data publikacji:: 2012
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: deformation
rubber-metal vibration
vibration isolation
viscoelasticity deformation
building construction
seismic isolator
finite element method
Źródło:: Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2012, 12, 4
1641-7739
Pojawia się w:: Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Methodology of integrated modeling of high-temperature steel processing in the aspect of supporting the design of new technologies
Autorzy:: Hojny, Marcin
Głowacki, Mirosław
Powiązania:: https://bibliotekanauki.pl/articles/1839642.pdf
Data publikacji:: 2020
Wydawca:: Polskie Towarzystwo Mechaniki Teoretycznej i Stosowanej
Tematy:: Finite Element Method
physical simulation
computer simulation
semi-solid deformation
Opis:: The article presents main assumptions of the methodology of integrated modeling of hightemperature steel processing in the aspect of supporting the design of new technologies. The developed solution uses a methodological research capability of modern Gleeble thermomechanical simulators to simulate physical processes, and the benefits of numerical modeling. This allows for restricting the number of expensive experimental tests to the minimum, e.g. by selecting a suitable heating schedule to achieve the desired temperature at the sample section, or getting additional information about the process, eg. estimating the zones with diversified grain growth dynamics, information on local cooling rates at any point within the volume of the sample tested. Mathematical models are original solutions of the developed methodology, such as the thermomechanical model of steel deformation in the semi-solid state, and the multi-scale model of resistance heating coupled with grain growth modelling in the micro scale. The work is supplemented with the main assumptions of the developed mathematical models together with examples of their practical use to support physical simulations.
Źródło:: Journal of Theoretical and Applied Mechanics; 2020, 58, 2; 361-371
1429-2955
Pojawia się w:: Journal of Theoretical and Applied Mechanics
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Coupling Characteristics of Needles and Backing Cloth During the Carpet Tufting Process
Autorzy:: Xu, Yang
Huang, Shuang
Sheng, Xiaowei
Zhijun, Sun
Powiązania:: https://bibliotekanauki.pl/articles/2171994.pdf
Data publikacji:: 2022
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:: tufted carpet
finite element model
needle force
deformation
backing cloth
Opis:: Focusing on the needle and backing cloth on a tufting machine type DHG801D-200, a finite element model was built using ABAQUS/Explicit software. The tufting processes, in which the individual tufting needles and 1/10 needle modules puncture the polypropylene woven and nonwoven fabrics (hot-air bonded nonwoven and thermo-calender bonded nonwoven), were simulated, respectively. Finally, the needle forces were estimated, and the deformations and stress field distribution of the backing cloth at different times were analysed.
Źródło:: Fibres & Textiles in Eastern Europe; 2022, 3 (151); 9--17
1230-3666
2300-7354
Pojawia się w:: Fibres & Textiles in Eastern Europe
Dostawca treści:: Biblioteka Nauki

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