On Green and Naghdi Thermoelasticity Model without Energy Dissipation with Higher Order Time Differential and Phase-Lags

Journal of Applied and Computational Mechanics

Ahmed Abouelregal¹ 

[1] Department of Mathematics, Faculty of Science, Mansoura University, Mansoura 35516, Egypt

[2]  Department of Mathematics, College of Science and Arts, Jouf University,Al-Qurayyat, Saudi Arabia;

关键词: thermoelasticity;    green-naghdi model ii;    phase-lags;    higher-order;    spherical cavity;   

DOI  :  10.22055/jacm.2019.29960.1649

来源: DOAJ

【 摘 要 】

In the present work, a modified model of heat conduction including higher order of time derivative is derived by extending Green and Naghdi theory without energy dissipation. We introduce two phase lag times to include the thermal displacement gradient and the heat flux in the heat conduction and depict microscopic responses more precisely. The constructed model is applied to study thermoelastic waves in a homogeneous and isotropic perfect conducting unbounded solid body containing a spherical cavity. We use the Laplace transform method to analyze the problem. The solutions for the field functions are obtained numerically using the numerical Laplace inversion technique. The results are analyzed in different tables and graphs and compared with those obtained earlier in the contexts of some other theories of thermoelasticity.

【 授权许可】

Unknown