Analysis of thermoelastic problems in isotropic solids undergoing large temperature changes based on novel models of thermoelasticity

Heng Liang Zhang, Seonho Kim, Geehong Choi, Dan Mei Xie, Hyung Hee Cho

Research output: Contribution to journalArticlepeer-review

Abstract

The accurate information of the thermal stresses and temperature in isotropic elastic solids is the key for many engineering applications. At present the classical linear coupled theory of thermoelasticity deduced with the assumptions of small temperature changes is widely used to solve the thermoelastic problems in engineering. In this paper, to describe the thermoelastic behavior in isotropic solids undergoing large temperature changes more accurately, the novel coupled models of thermoelasticity and the corresponding finite element models have been presented explicitly and validated by experimental measurement. The effect of large temperature changes on the solutions of thermoelastic problems is discussed. For the heat transfer process, if the isotropic elastic solids will expand when heated and contract when cooled and the condition [Formula presented]·[Formula presented]−[Formula presented]α<0 can be met in the context of small deformations, the effect of large temperature changes can be regarded as increasing the specific heat. The proposed models are applied to solve two thermoelastic problems. From the obtained numerical results, the effect of large temperature changes will increase with the amplitude of temperature change and may be considerably even when the temperature changes slowly.

Original languageEnglish
Article number121576
JournalInternational Journal of Heat and Mass Transfer
Volume177
DOIs
Publication statusPublished - 2021 Oct

Bibliographical note

Funding Information:
This work was supported by the Korean Institute of Energy Technology Evaluation and Planning (KETEP) under a grant funded by the Korean government Ministry of Trade, Industry and Energy (No. 20144030200560 ) and the National Research Foundation of Korea (NRF) under a grant funded by the Korea government (MEST) (No. 2011-0017673 ), the National Natural Science Foundation of China (Approval Nos. 51776140).

Publisher Copyright:
© 2021

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanical Engineering
  • Fluid Flow and Transfer Processes

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