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Journal articles on the topic 'Thermomechanical finite element'

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Author: Grafiati

Published: 11 March 2023

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1

Beynon, John H. "Finite–element modelling of thermomechanical processing." Philosophical Transactions of the Royal Society of London. Series A: Mathematical, Physical and Engineering Sciences 357, no. 1756 (June 15, 1999): 1573–87. http://dx.doi.org/10.1098/rsta.1999.0390.

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2

Liu, Donghuan, and Yinghua Liu. "Applications of Discontinuous Galerkin Finite Element Method in Thermomechanical Coupling Problems with Imperfect Thermal Contact." Mathematical Problems in Engineering 2013 (2013): 1–14. http://dx.doi.org/10.1155/2013/861417.

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Thermomechanical coupling problems with imperfect thermal contact are analyzed in the present paper with discontinuous Galerkin finite element method. The imperfect thermal contact condition is characterized by thermal contact resistance. The whole thermomechanical coupling problem is solved alternatively with the thermal subproblem and mechanical subproblem. Thermal contact resistance is introduced directly with the interface numerical flux of the present discontinuous Galerkin finite element method without using interface element as traditional continuous Galerkin finite element method does. Numerical results show the accuracy and feasibility of the present discontinuous Galerkin finite element method in solving thermomechanical coupling problems with imperfect thermal contact.

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3

Wang, Jun, Weihong Zhang, Jihong Zhu, Yingjie Xu, Xiaojun Gu, and Ziad Moumni. "Finite element simulation of thermomechanical training on functional stability of shape memory alloy wave spring actuator." Journal of Intelligent Material Systems and Structures 30, no. 8 (March 21, 2019): 1239–51. http://dx.doi.org/10.1177/1045389x19831356.

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Pre-service thermomechanical training is of great significance to achieve functional stability for shape memory alloy device. This article presents a finite element simulation of the training behavior of a shape memory alloy wave spring actuator using a thermomechanically coupled and finite-strain shape memory alloy model (Wang et al., 2017a). The model is implemented into ABAQUS/Explicit by means of a user-defined material subroutine VUMAT. The introduction of a finite-Hencky-strain return-mapping integration scheme substantially improves the numerical efficiency and stability. Model predictions are validated against the experimental data. The good agreement between both demonstrates the capabilities of the model of well describing the training behavior of shape memory alloy when subjected to large cyclic thermomechanical loading. Simulation results illustrate several primary thermomechanical characteristics during training process, such as the expansion of the phase transformation zone, the accumulation of the residual deformation, and the concentration of the internal stress. The present finite element approach provides a powerful tool in design and optimization of shape memory alloy wave spring actuator, especially to improve the geometric precision and to enhance the two-way shape memory effect.

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4

Marghmaleki, Iman Soleimani, Y. Tadi Beni, Amin Reza Noghrehabadi, Asieh Sadat Kazemi, and Mohamadreza Abadyan. "Finite Element Simulation of Thermomechanical Spinning Process." Procedia Engineering 10 (2011): 3769–74. http://dx.doi.org/10.1016/j.proeng.2011.04.616.

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5

Das, S., Eric J. Palmiere, and I. C. Howard. "Modelling Recrystallisation during Thermomechanical Processing Using CAFE." Materials Science Forum 467-470 (October 2004): 623–28. http://dx.doi.org/10.4028/www.scientific.net/msf.467-470.623.

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A common feature that stimulates modelling efforts across the various physical sciences is that complex microscopic behaviour underlies apparently simple macroscopic effects. Mathematical formulations attempt to capture the initial and evolving microstructural entities either implicitly or explicitly and link their effects to measurable macroscopic variables such as load or stress by averaging out any microscopic fluctuations. The implicit formulations that ignore the inherent spatial heterogeneity in the deforming domain form the basis of constitutive models for input to finite element (FE) systems. On the other hand, explicit formulations to capture and link microstructural entities rely on narrowing down the size of each finite element, thereby increasing the number of finite elements in the deforming domain, an effect accompanied by a rapid growth in computational time. The model described here, Cellular Automata based Finite Elements (CAFE), utilises the Cellular Automata technique to represent initial and evolving microstructural features (e.g., dislocation densities, grain sizes, etc.) in C-Mn steels at an appropriate length scale by linking the macro-scale process variables obtained using an overlying finite element mesh. Differences will be illustrated between single and two-pass hot rolling experiments.

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6

Nicholson, D. W., N. W. Nelson, B. Lin, and A. Farinella. "Finite Element Analysis of Hyperelastic Components." Applied Mechanics Reviews 51, no. 5 (May 1, 1998): 303–20. http://dx.doi.org/10.1115/1.3099007.

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Finite element analysis of hyperelastic components poses severe obstacles owing to features such as large deformation and near-incompressibility. In recent years, outstanding issues have, to a considerable extent, been addressed in the form of the hyperelastic element available in commercial finite element codes. The current review article, which updates and expands a 1990 article in Rubber Reviews, is intended to serve as a brief exposition and selective survey of the recent literature. Published simulations are listed. Rubber constitutive models and the measurement of their parameters are addressed. The underlying incremental variational formulation is sketched for thermomechanical response of compressible, incompressible and near-incompressible elastomers. Coupled thermomechanical effects and broad classes of boundary conditions, such as variable contact, are encompassed. Attention is given to advanced numerical techniques such as arc length methods. Remaining needs are assessed. This review article contains 142 references.

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7

El Amri, Abdelouahid, M. El Yakhloufi Haddou, and Abdelaltif Khamlichi. "Finite Element Simulation of Complex Thermomechanical Fatigue Evolution." Materials Science Forum 883 (January 2017): 32–36. http://dx.doi.org/10.4028/www.scientific.net/msf.883.32.

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Fatigue failures occur due to the application of fluctuating stresses that are much lower than the stress required to cause failure during a single application of stress. The process is dangerous because a single application of the load would not produce any ill effects, and a conventional stress analysis might lead to assumption of safety that does not exist. The fatigue process is thought to begin at an internal or surface flaw here the stresses are concentrated, and consists initially of shear flow along slip planes. The mechanisms of fatigue-crack propagation are examined with particular emphasis on the similarities and differences between cyclic crack growth in ductile materials, such as metals, and corresponding behavior in brittle materials, such as intermetallic and ceramics. Fatigue, as understood by materials technologists, is a process in which damage accumulates due to the repetitive application of leads that may be well below the yield point.

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8

Fleischhauer, R., R. Behnke, and M. Kaliske. "A thermomechanical interface element formulation for finite deformations." Computational Mechanics 52, no. 5 (May 3, 2013): 1039–58. http://dx.doi.org/10.1007/s00466-013-0862-7.

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9

Mitrofanov, A. V., V. I. Babitsky, and V. V. Silberschmidt. "Thermomechanical finite element simulations of ultrasonically assisted turning." Computational Materials Science 32, no. 3-4 (March 2005): 463–71. http://dx.doi.org/10.1016/j.commatsci.2004.09.019.

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10

Michel, R., R. Kreißig, and H. Ansorge. "Thermomechanical finite element analysis (FEA) of spin extrusion." Forschung im Ingenieurwesen 68, no. 1 (July 2003): 19–24. http://dx.doi.org/10.1007/s10010-003-0103-x.

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11

Burlayenko, Vyacheslav N. "Modelling Thermal Shock in Functionally Graded Plates with Finite Element Method." Advances in Materials Science and Engineering 2016 (2016): 1–12. http://dx.doi.org/10.1155/2016/7514638.

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Thermomechanical behavior and crack propagation in a functionally graded metal/ceramic plate undergoing thermal shock are analyzed by using the finite element method. A two-dimensional plane strain functionally graded finite element has been developed within the ABAQUS software environment for this purpose. An actual material gradation has been accomplished by sampling material quantities directly at the Gauss points of the element via programming appropriate user-defined subroutines. The virtual crack closure technique is used to model a crack growth under thermal loading. Contact possible between crack lips during the crack advance is taken into account in thermomechanical simulations as well. The paper shows that the presented finite element model can be applied to provide an insight into the thermomechanical respond and failure of the metal/ceramic plate.

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12

Zivkovic, Dragoljub, Dragan Milcic, Milan Banic, and Pedja Milosavljevic. "Thermomechanical finite element analysis of hot water boiler structure." Thermal Science 16, suppl. 2 (2012): 387–98. http://dx.doi.org/10.2298/tsci120503177z.

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The paper presents an application of the Finite Elements Method for stress and strain analysis of the hot water boiler structure. The aim of the research was to investigate the influence of the boiler scale on the thermal stresses and strains of the structure of hot water boilers. Results show that maximum thermal stresses appear in the zone of the pipe carrying wall of the first reversing chamber. This indicates that the most critical part of the boiler are weld spots of the smoke pipes and pipe carrying plate, which in the case of significant scale deposits can lead to cracks in the welds and water leakage from the boiler. The nonlinear effects were taken into account by defining the bilinear isotropic hardening model for all boiler elements. Temperature dependency was defined for all relevant material properties, i. e. isotropic coefficient of thermal expansion, Young?s modulus, and isotropic thermal conductivity. The verification of the FEA model was performed by comparing the measured deformations of the hot water boiler with the simulation results. As a reference object, a Viessmann - Vitomax 200 HW boiler was used, with the installed power of 18.2 MW. CAD modeling was done within the Autodesk Inventor, and stress and strain analysis was performed in the ANSYS Software.

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13

Wieser, G., L. Qiao, A. Eberle, and H. Völzke. "Thermomechanical Finite-element Analyses Of Bolted Cask Lid Structures." Packaging, Transport, Storage & Security of Radioactive Material 15, no. 3-4 (March 2004): 223–30. http://dx.doi.org/10.1179/174650904775295667.

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14

Huang, C. J., and E. Ghassemieh. "3D Coupled Thermomechanical Finite Element Analysis of Ultrasonic Consolidation." Materials Science Forum 539-543 (March 2007): 2651–56. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.2651.

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A 3-D coupled temperature-displacement finite element analysis is performed to study an ultrasonic consolidation process. Results show that ultrasonic wave is effective in causing deformation in aluminum foils. Ultrasonic vibration leads to an oscillating stress field. The oscillation of stress in substrate lags behind the ultrasonic vibration by about 0.1 cycle of ultrasonic wave. The upper foil, which is in contact with the substrate, has the most severe deformation. The substrate undergoes little deformation. Apparent material softening by ultrasonic wave, which is of great concern for decades, is successfully simulated. The higher the friction coefficient, the more obvious the apparent material softening effect.

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15

Tuǧcu, P. "Finite element analysis of thermomechanical coupling in tensile instability." International Journal of Engineering Science 32, no. 6 (June 1994): 1017–27. http://dx.doi.org/10.1016/0020-7225(94)90053-1.

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16

Jaśkowiec, J., and S. Milewski. "Coupling finite element method with meshless finite difference method in thermomechanical problems." Computers & Mathematics with Applications 72, no. 9 (November 2016): 2259–79. http://dx.doi.org/10.1016/j.camwa.2016.08.020.

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17

Cox, Austin, Theocharis Baxevanis, and Dimitris C. Lagoudas. "Finite Element Analysis of Precipitation Effects on Ni-Rich NiTi Shape Memory Alloy Response." Materials Science Forum 792 (August 2014): 65–71. http://dx.doi.org/10.4028/www.scientific.net/msf.792.65.

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Thermomechanical properties of precipitated NiTi shape memory alloys are investigated using the finite element method. The precipitated material microstructure is explored using a representative volume element with embedded Ni4Ti3 precipitates. Features such as precipitate coherency and distribution of Ni within the matrix due to the precipitation process are individually explored and characterized. Changes in the material’s macroscopic thermomechanical response due to this precipitation are determined.

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18

Krivenko, Olha, and Yurii Vorona. "Comparative Analysis of Nonlinear Deformation and Buckling of Thin Elastic Shells of Step-Variable Thickness." Strength of Materials and Theory of Structures, no. 108 (May 30, 2022): 107–18. http://dx.doi.org/10.32347/2410-2547.2022.108.107-118.

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A comparative analysis of finite element models and methods for solving complex problems of geometrically nonlinear deformation, buckling and post-buckling behavior of thin shells of stepwise variable thickness is carried out. An approach based on the use of the moment scheme of finite elements is considered. The features of using the software suite LIRA and integrated software system SCAD for solving the assigned problems are also provided. Thin and medium thickness shells are considered. They can have different geometric features in thickness and be under the action of static thermomechanical loads. A technique for solving these problems with the help of an efficient refined approach is presented. The technique is based on the general methodological positions of the three-dimensional theory of thermoelasticity and the use of the finite element moment scheme. With this approach, the approximation through the shell thickness is carried out by a single universal spatial finite element. The element can be modified in different portions of the shell with a step-variable thickness. It can be located eccentrically relative to the middle surface of the casing and can change its dimensions in the direction of the shell thickness. Such a unified approach made it possible to create a unified designed finite element model of a shell of an inhomogeneous geometric structure under the combined action of a thermomechanical load. A comparative analysis of the application of three finite element approaches for problems of geometrically nonlinear deformation and buckling of shells of stepwise variable thickness is carried out.

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19

Wang, Youshan, Yintao Wei, Xijin Feng, and Zhenhan Yao. "Finite Element Analysis of the Thermal Characteristics and Parametric Study of Steady Rolling Tires." Tire Science and Technology 40, no. 3 (October 1, 2012): 201–18. http://dx.doi.org/10.2346/tire.12.400304.

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ABSTRACT This article presents a numerical thermomechanical analysis and parametric study of steady rolling tires that are treated as axisymmetric structures for simplification. Under periodic stress–strain cycles, during tire rolling, internal heat will be generated because of energy loss from the tire material. A general-purpose, finite element program is used to model this two-dimensional heat conduction with distributed, internal heat sources, whereas an in-house code for tire simulation performs the underlying three-dimensional structure and heat-generation rate analysis. The tire belts and carcasses are modeled using layer solid elements with transverse, isotropic, thermomechanical properties, whereas the rubber components are made of isotropic materials. The goal of this article is to develop a simple and easy methodology for simulating tire thermomechanical behavior. Furthermore, the parametric study for the highest shoulder temperature (HST), which is widely accepted as one of the triggers of tire failure, has been performed. The HST sensitivities to the selected parameters have been computed from the simulated temperature fields under different conditions, which provide a guidance to improve the tire structural, material, and pattern designs.

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20

Shamim, Muhammad Babar, Marian Hörsting, and Stephan Wulfinghoff. "Variational Reduced-Order Modeling of Thermomechanical Shape Memory Alloy Based Cooperative Bistable Microactuators." Actuators 12, no. 1 (January 10, 2023): 36. http://dx.doi.org/10.3390/act12010036.

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This article presents the formulation and application of a reduced-order thermomechanical finite strain shape memory alloy (SMA)-based microactuator model for switching devices under thermal loading by Joule heating. The formulation is cast in the generalized standard material framework with an extension for thermomechanics. The proper orthogonal decomposition (POD) is utilized for capturing a reduced basis from a precomputed finite element method (FEM) full-scale model. The modal coefficients are computed by optimization of the underlying incremental thermomechanical potential, and the weak form for the mechanical and thermal problem is formulated in reduced-order format. The reduced-order model (ROM) is compared with the FEM model, and the exemplary mean absolute percentage errors for the displacement and temperature are 0.973% and 0.089%, respectively, with a speedup factor of 9.56 for a single SMA-based actuator. The ROM presented is tested for single and cooperative beam-like actuators. Furthermore, cross-coupling effects and the bistability phenomenon of the microactuators are investigated.

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21

Walsh, S. D. C., and A. Tordesillas. "A thermomechanical formulation of finite element schemes for micropolar continua." ANZIAM Journal 46 (May 6, 2005): 336. http://dx.doi.org/10.21914/anziamj.v46i0.963.

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22

Krok, Alexander, Pablo García-Triñanes, Marian Peciar, and Chuan-Yu Wu. "Finite element analysis of thermomechanical behaviour of powders during tabletting." Chemical Engineering Research and Design 110 (June 2016): 141–51. http://dx.doi.org/10.1016/j.cherd.2016.03.019.

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23

Nallathambi, Ashok Kumar, Mohit Tyagi, Eckehard Specht, and Albrecht Bertram. "Thermomechanical analysis of direct chill casting using finite element method." Transactions of the Indian Institute of Metals 64, no. 1-2 (February 2011): 13–19. http://dx.doi.org/10.1007/s12666-011-0003-y.

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24

Nicholson, D. W., and B. Lin. "Finite element method for thermomechanical response of near-incompressible elastomers." Acta Mechanica 124, no. 1-4 (March 1997): 181–98. http://dx.doi.org/10.1007/bf01213024.

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25

CELENTANO, D., S. OLLER, and E. OÑATE. "A finite element model for thermomechanical analysis in casting processes." Le Journal de Physique IV 03, no. C7 (November 1993): C7–1171—C7–1180. http://dx.doi.org/10.1051/jp4:19937182.

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26

HANSEN, N., D. JUUL JENSEN, Y. L. LIU, and N. J. SØRENSEN. "Thermomechanical behaviour and finite element modelling of metal matrix composites." Le Journal de Physique IV 03, no. C7 (November 1993): C7–1705—C7–1710. http://dx.doi.org/10.1051/jp4:19937267.

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27

Wriggers, P., and C. Miehe. "Contact constraints within coupled thermomechanical analysis—A finite element model." Computer Methods in Applied Mechanics and Engineering 113, no. 3-4 (March 1994): 301–19. http://dx.doi.org/10.1016/0045-7825(94)90051-5.

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28

Meguid, S. A., and G. D. Hu. "A new finite element for treating plane thermomechanical heterogeneous solids." International Journal for Numerical Methods in Engineering 44, no. 4 (February 10, 1999): 567–85. http://dx.doi.org/10.1002/(sici)1097-0207(19990210)44:4<567::aid-nme521>3.0.co;2-b.

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29

Tan, Khai Shiang, Sim Jui Oon, Li Yuan Teng, Teck Yong Tou, Seong Shan Yap, Chun Sean Lau, and Yoong Tatt Chin. "Thermomechanical studies of surface mounted microelectronics by finite element analysis." Composites Part B: Engineering 162 (April 2019): 461–68. http://dx.doi.org/10.1016/j.compositesb.2018.12.151.

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30

Oancea, V. G., and T. A. Laursen. "A finite element formulation of thermomechanical rate-dependent frictional sliding." International Journal for Numerical Methods in Engineering 40, no. 23 (December 15, 1997): 4275–311. http://dx.doi.org/10.1002/(sici)1097-0207(19971215)40:23<4275::aid-nme257>3.0.co;2-k.

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31

Gill, P., and K. Davey. "A thermomechanical finite element tool for Leak-before-Break analysis." International Journal for Numerical Methods in Engineering 98, no. 9 (March 19, 2014): 678–702. http://dx.doi.org/10.1002/nme.4656.

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32

Rakotomalala, R., P. Joyot, and M. Touratier. "Arbitrary Lagrangian-Eulerian thermomechanical finite-element model of material cutting." Communications in Numerical Methods in Engineering 9, no. 12 (December 1993): 975–87. http://dx.doi.org/10.1002/cnm.1640091205.

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33

Shen, Hong, Jun Hu, and Zhenqiang Yao. "Mixed-dimensional coupling modeling for laser forming process." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 228, no. 16 (February 20, 2014): 2950–59. http://dx.doi.org/10.1177/0954406214525136.

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Efficient laser forming modeling for industrial application is still in the developing stage and many researchers are in the process of modifying it. Conventional three-dimensional finite element models are still expensive on computational time. In this paper, a finite element model adopting a shell-solid coupling technique is developed for the thermomechanical analysis of laser forming process. In the shell-solid coupling method, an additional shell element plane is utilized to transfer heat flux and displacement from the solid elements to the shell elements. The effects of the additional interface shell element thickness on temperature distribution and final distortion are investigated. The presented shell-solid coupling method is evaluated by the results of three-dimensional simulations and experimental data.

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34

Sotiriou, Marios P., John S. Aristeidakis, Maria-Ioanna T. Tzini, Ioanna Papadioti, Gregory N. Haidemenopoulos, and Nikolaos Aravas. "Microstructural and Thermomechanical Simulation of the Additive Manufacturing Process in 316L Austenitic Stainless Steel." Materials Proceedings 3, no. 1 (February 18, 2021): 20. http://dx.doi.org/10.3390/iec2m-09237.

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Additive manufacturing of an AISI 316L austenitic stainless steel was studied via an integrated thermomechanical and microstructural modelling approach. A finite element technique was employed to evaluate the temperature evolution due to successive material deposition. Heat transfer simulations provided the temperature field history, required to determine the microstructural evolution. Thermodynamic and kinetic simulations were employed to calculate temporal and spatial distribution of phases and alloying elements upon solidification and subsequent thermal cycling. The ensuing microstructural properties could be provided as an input for a mechanical finite element analysis to calculate, based on local mechanical properties, the residual stresses and distortions.

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35

Lagoudas, D. C., J. G. Boyd, and Z. Bo. "Micromechanics of Active Composites With SMA Fibers." Journal of Engineering Materials and Technology 116, no. 3 (July 1, 1994): 337–47. http://dx.doi.org/10.1115/1.2904297.

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The study of the effective thermomechanical response of active fibrous composites with shape memory alloy (SMA) fibers is the subject of this work. A 3-D constitutive response for the SMA fibers is formulated first. To model thermomechanical loading path dependence, an incremental approach is used assuming that within each stress and temperature increment the volume fraction of the martensitic phase remains constant in the SMA fibers. The Mori-Tanaka averaging scheme is then used to give an estimate of the instantaneous effective thermomechanical properties in terms of the thermomechanical properties of the two phases and martensitic volume fraction. A unit cell model for a periodic active composite with cubic and hexagonal arrangement of fibers is also developed to study the effective properties using finite element analysis. It is found that since the fibers and not the matrix undergo the martensitic phase transformation that induces eigenstrains, the Mori-Tanaka averaging scheme accurately models the thermomechanical response of the composite, relative to the finite element analysis, for different loading paths. Specific results are reported for the composite pseudoelastic and shape memory effect for an elastomeric matrix continuous SMA fiber composite.

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36

Fu, C., D. L. McDowell, and I. C. Ume. "A Finite Element Procedure of a Cyclic Thermoviscoplasticity Model for Solder and Copper Interconnects." Journal of Electronic Packaging 120, no. 1 (March 1, 1998): 24–34. http://dx.doi.org/10.1115/1.2792281.

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A finite element procedure using a semi-implicit time-integration scheme has been developed for a cyclic thermoviscoplastic constitutive model for Pb-Sn solder and OFHC copper, two common metallic constituents in electronic packaging applications. The scheme has been implemented in the commercial finite element (FE) code ABAQUS (1995) via the user-defined material subroutine, UMAT. Several single-element simulations are conducted to compare with previous test results, which include monotonic tensile tests, creep tests, and a two-step ratchetting test for 62Sn36Pb2Ag solder; a nonproportional axial-torsional test and a thermomechanical fatigue (TMF) test for OFHC copper. At the constitutive level, we also provide an adaptive time stepping algorithm, which can be used to improve the overall computation efficiency and accuracy especially in large-scale FE analyses. We also compare the computational efforts of fully backward Euler and the proposed methods. The implementation of the FE procedure provides a guideline to apply user-defined material constitutive relations in FE analyses and to perform more sophisticated thermomechanical simulations. Such work can facilitate enhanced understanding thermomechanical reliability issue of solder and copper interconnects in electronic packaging applications.

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37

Hachkevych, O. R., V. S. Mykhailyshyn, and A. Ravska-Skotnichna. "Residual Stresses due to High Temperature Annealing. Mathematical Model and Calculations." Materials Science Forum 524-525 (September 2006): 355–60. http://dx.doi.org/10.4028/www.scientific.net/msf.524-525.355.

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The mathematical model is developed for description of thermomechanical processes at cooling during high temperature annealing with the known initial temperature distribution (the temperature of holding) and stresses (acquired stresses at the final of a holding). It is taken into account the thermal sensitivity and material hardening at elasto-plastic solid deforming. The methodology based on the finite element method is proposed for solving thermomechanics problems of wide range. The suitable software is developed. At the final stage of annealing a cylindrical solid it is investigated residual stresses being formed on the cooling stage.

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38

Koohbor, B., and S. Serajzadeh. "Thermomechanical behaviours of strip and work-rolls in cold rolling process." Journal of Strain Analysis for Engineering Design 46, no. 8 (August 22, 2011): 794–804. http://dx.doi.org/10.1177/0309324711417693.

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A finite element analysis was developed to determine thermomechanical behaviours of strip and work-roll during cold rolling process under practical rolling conditions. The velocity field was first obtained using a rigid-plastic finite element formulation and then it was used to assess the strain and stress distributions within the strip and at the same time, a thermal finite element model based on streamline upwind Petrov–Galerkin scheme was employed to predict temperature distribution within the metal being rolled. In the next stage, the predicted temperature and stress fields at the contact region of strip/work-roll were employed as the boundary conditions to evaluate the thermomechanical behaviour of the work-roll while the effect of back-up rolls was also considered in the mechanical part of the analysis. The model is shown to provide a proper insight for studying the deformation of strip and work-roll during high speed cold rolling process with a relatively low computational cost.

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39

Wu, Wenhua, Ping Hu, and Guozhe Shen. "Thermomechanical-Phase Transformation Simulation of High-Strength Steel in Hot Stamping." Mathematical Problems in Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/982785.

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The thermomechanical-phase transformation coupled relationship of high-strength steel has important significance in forming the mechanism and numerical simulation of hot stamping. In this study a new numerical simulation module of hot stamping is proposed, which considers thermomechanical-transformation multifield coupled nonlinear and large deformation analysis. In terms of the general shell finite element and 3D tetrahedral finite element analysis methods related to temperature, a coupled heat transmission model for contact interfaces between blank and tools is proposed. Meanwhile, during the hot stamping process, the phase transformation latent heat is introduced into the analysis of temperature field. Next the thermomechanical-transformation coupled constitutive models of the hot stamping are considered. Static explicit finite element formulae are adopted and implemented to perform the full numerical simulations of the hot stamping process. The hot stamping process of typical U-shaped and B-pillar steel is simulated using the KMAS software, and a strong agreement comparison between temperature, equivalent stress, and fraction of martensite simulation and experimental results indicates the validity and efficiency of the hot stamping multifield coupled constitutive models and numerical simulation software KMAS. The temperature simulated results also provide the basic guide for the optimization designs of cooling channels in tools.

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40

Machairas, Theodoros T., Alexandros G. Solomou, Anargyros A. Karakalas, and Dimitris A. Saravanos. "Effect of shape memory alloy actuator geometric non-linearity and thermomechanical coupling on the response of morphing structures." Journal of Intelligent Material Systems and Structures 30, no. 14 (July 10, 2019): 2166–85. http://dx.doi.org/10.1177/1045389x19862362.

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The response of adaptive structures entailing shape memory alloy actuators is investigated both numerically and experimentally in this work. Emphasis is placed on the inclusion of large displacements and rotations, as well as thermomechanical coupling in the simulation of the shape memory alloy actuators. Reduced multi-field beam finite element models for shape memory alloy actuators, encompassing a co-rotational formulation for large displacements and capability to provide the thermomechanically coupled transient response, are briefly overviewed. Prototypes of two adaptive structure configurations are developed, experimentally characterized, and numerically modeled. The measured response of the two prototypes is correlated with respective numerical results that consider both the geometric non-linearity and the thermomechanical coupling of the shape memory alloy actuators. Hence, the influence of these two effects on the predicted response of both the actuator and the adaptive structure is demonstrated. The results quantify also the interactions between geometric non-linearity and thermomechanical coupling terms. As it is shown, better agreement with experimental data is obtained when considering both effects.

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41

Krivenko, Olha, Yurii Vorona, and Andrii Kozak. "Finite element analysis of nonlinear deformation, stability and vibrations of elastic thin-walled structures." Strength of Materials and Theory of Structures, no. 107 (October 29, 2021): 20–34. http://dx.doi.org/10.32347/2410-2547.2021.107.20-34.

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Thin-walled shell-type structures are widely used in various branches of technology and industry. Such structures under operating conditions are usually exposed to various loads, including thermomechanical ones. Real shell structures, as a rule, have a complex shapes. To increase reliability, reduce material consumption, for technological reasons, they are designed as inhomogeneous systems in thickness. This causes a great and constant interest of engineers and designers in the problems of investigating the behavior of elastic thin-walled shell structures. The work is devoted to the method of analysis of geometrically nonlinear deformation, stability, post-buckling behavior and natural vibrations of thin elastic shells of complex shape and structure under the action of static thermomechanical loads. The unified design model has been created on the basis of the developed universal spatial finite element with introduced additional variable parameters. The model takes into account the multilayer material structure and geometric features for structural elements of the thin shell. The shells can be reinforced with ribs and cover plates, weakened by cavities, channels and holes, have sharp bends in the mid-surface. Such a uniform formulation made it possible to create a unified finite element model of the shells with an inhomogeneous structure. It is shown on a number of problems that the method presented in this article is an effective tool for analyzing geometrically nonlinear deformation, stability, post-buckling behavior and natural vibrations of thin elastic shells of an inhomogeneous structure under the action of static thermomechanical loads.

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42

Shin, Eui-Sup, and Ji-Man Jin. "Subdomain-Based Finite Element Method for Thermomechanical Analysis with Thermal Radiation." Transactions of the Korean Society of Mechanical Engineers A 30, no. 6 (June 1, 2006): 705–12. http://dx.doi.org/10.3795/ksme-a.2006.30.6.705.

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Wang, Jingyi, and Panayiotis Papadopoulos. "Coupled thermomechanical analysis of fused deposition using the finite element method." Finite Elements in Analysis and Design 197 (December 2021): 103607. http://dx.doi.org/10.1016/j.finel.2021.103607.

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Ng, Wei Heok, Peretz P. Friedmann, and Anthony M. Waas. "Thermomechanical Behavior of a Damaged Thermal Protection System: Finite-Element Simulations." Journal of Aerospace Engineering 25, no. 1 (January 2012): 90–102. http://dx.doi.org/10.1061/(asce)as.1943-5525.0000111.

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Chen, C. M., and R. Kovacevic. "Finite element modeling of friction stir welding—thermal and thermomechanical analysis." International Journal of Machine Tools and Manufacture 43, no. 13 (October 2003): 1319–26. http://dx.doi.org/10.1016/s0890-6955(03)00158-5.

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Wu, Kuo-Tsai, Sheng-Jye Hwang, Huei-Huang Lee, and Bing-Yeh Lin. "Finite element analysis of multi-level interconnection under cyclic thermomechanical loads." Microsystem Technologies 24, no. 2 (May 25, 2017): 1003–16. http://dx.doi.org/10.1007/s00542-017-3448-z.

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Abdel-Hamid, A., A. S. Wifi, and M. El Gallab. "A three dimensional finite element thermomechanical analysis of intermittent cutting process." Journal of Materials Processing Technology 56, no. 1-4 (January 1996): 643–54. http://dx.doi.org/10.1016/0924-0136(95)01878-6.

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Davis, L. C., and J. E. Allison. "Finite element modelling of the thermomechanical properties of metal-matrix composites." Journal of Computer-Aided Materials Design 3, no. 1-3 (August 1996): 167–68. http://dx.doi.org/10.1007/bf01185650.

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Dabbagh, Ali, Ahmed Madfa, Sadjad Naderi, Mahtab Talaeizadeh, Hadijah Abdullah, Mohamed Abdulmunem, and NH Abu Kasim. "Thermomechanical advantages of functionally graded dental posts: A finite element analysis." Mechanics of Advanced Materials and Structures 26, no. 8 (December 26, 2017): 700–709. http://dx.doi.org/10.1080/15376494.2017.1410909.

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Li, Dz-Chi, Shiang-Woei Chyuan, Jeng-Tzong Chen, and Cherng-Yuan Sun. "Thermomechanical Response Analysis of Lithographic Mask Structure Using Finite Element Method." JSME international journal. Ser. A, Mechanics and material engineering 38, no. 4 (October 15, 1995): 563–71. http://dx.doi.org/10.1299/jsmea1993.38.4_563.

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