Applied Mathematics and Mechanics (English Edition) ›› 2012, Vol. 33 ›› Issue (4): 483-498.doi: https://doi.org/10.1007/s10483-012-1565-8

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Effects of three-phase-lag on two-temperature generalized thermoelasticity for infinite medium with spherical cavity

S. BANIK, M. KANORIA   

  1. Department of Applied Mathematics, University of Calcutta, Kolkata 700009, India
  • 收稿日期:2010-12-20 修回日期:2011-10-15 出版日期:2012-04-15 发布日期:2012-04-15
  • 通讯作者: M. KANORIA, Associate Professor, Ph.D., E-mail: k_mri@yahoo.com E-mail:k_mri@yahoo.com

Effects of three-phase-lag on two-temperature generalized thermoelasticity for infinite medium with spherical cavity

S. BANIK, M. KANORIA   

  1. Department of Applied Mathematics, University of Calcutta, Kolkata 700009, India
  • Received:2010-12-20 Revised:2011-10-15 Online:2012-04-15 Published:2012-04-15
  • Contact: M. KANORIA, Associate Professor, Ph.D., E-mail: k_mri@yahoo.com E-mail:k_mri@yahoo.com

摘要:

The thermoelastic interaction for the three-phase-lag (TPL) heat equation in an isotropic infinite elastic body with a spherical cavity is studied by two-temperature generalized thermoelasticity theory (2TT). The heat conduction equation in the theory of TPL is a hyperbolic partial differential equation with a fourth-order derivative with respect to time. The medium is assumed to be initially quiescent. By the Laplace transformation, the fundamental equations are expressed in the form of a vector-matrix differential equation, which is solved by a state-space approach. The general solution obtained is applied to a specific problem, when the boundary of the cavity is subjected to the thermal loading (the thermal shock and the ramp-type heating) and the mechanical loading. The inversion of the Laplace transform is carried out by the Fourier series expansion techniques. The numerical values of the physical quantity are computed for the copper like material. Significant dissimilarities between two models (the two-temperature Green-Naghdi theory with energy dissipation (2TGN-III) and two-temperature TPL model (2T3phase)) are shown graphically. The effects of two-temperature and ramping parameters are also studied.

Abstract:

The thermoelastic interaction for the three-phase-lag (TPL) heat equation in an isotropic infinite elastic body with a spherical cavity is studied by two-temperature generalized thermoelasticity theory (2TT). The heat conduction equation in the theory of TPL is a hyperbolic partial differential equation with a fourth-order derivative with respect to time. The medium is assumed to be initially quiescent. By the Laplace transformation, the fundamental equations are expressed in the form of a vector-matrix differential equation, which is solved by a state-space approach. The general solution obtained is applied to a specific problem, when the boundary of the cavity is subjected to the thermal loading (the thermal shock and the ramp-type heating) and the mechanical loading. The inversion of the Laplace transform is carried out by the Fourier series expansion techniques. The numerical values of the physical quantity are computed for the copper like material. Significant dissimilarities between two models (the two-temperature Green-Naghdi theory with energy dissipation (2TGN-III) and two-temperature TPL model (2T3phase)) are shown graphically. The effects of two-temperature and ramping parameters are also studied.

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