Applied Mathematics and Mechanics (English Edition) ›› 2017, Vol. 38 ›› Issue (8): 1091-1108.doi: https://doi.org/10.1007/s10483-017-2230-9

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Fractional-order generalized thermoelastic diffusion theory

Chunbao XIONG, Yanbo NIU   

  1. School of Civil Engineering, Tianjin University, Tianjin 300072, China
  • Received:2016-12-04 Revised:2017-03-19 Online:2017-08-01 Published:2017-08-01
  • Contact: Yanbo NIU E-mail:nyb5612388@tju.edu.cn

Abstract:

The present work aims to establish a fractional-order generalized themoelastic diffusion theory for anisotropic and linearly thermoelastic diffusive media. To numerically handle the multi-physics problems expressed by a sequence of incomplete differential equations, particularly by a fractional equation, a generalized variational principle is obtained for the unified theory using a semi-inverse method. In numerical implementation, the dynamic response of a semi-infinite medium with one end subjected to a thermal shock and a chemical potential shock is investigated using the Laplace transform. Numerical results, i.e., non-dimensional temperature, chemical potential, and displacement, are presented graphically. The influence of the fractional order parameter on them is evaluated and discussed.

Key words: asymptotically regular mappings, p-uniformly convex Banach space, asymptotic center, fixed points, generalized thermoelastic diffusion, Laplace transform, fractional calculus, generalized variational principle

2010 MSC Number: 

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