Steel and Composite Structures

Volume 36, Number 6, 2020, pages 617-629

DOI: 10.12989/scs.2020.36.6.617

Modeling of memory-dependent derivative in a rotating magneto-thermoelastic diffusive medium with variable thermal conductivity

Samia M. Said, Elsayed M. Abd-Elaziz and Mohamed I.A. Othman

Abstract

The purpose of this paper is to depict the effect of rotation and initial stress on a magneto-thermoelastic medium with diffusion. The problem discussed within memory-dependent derivative in the context of the three-phase-lag model (3PHL), Green-Naghdi theory of type III (G-N III) and Lord and Shulman theory (L-S). Analytical expressions of the considered variables are obtained by using Laplace-Fourier transforms technique. Numerical results for the field quantities given in the physical domain and illustrated graphically in the absence and presence of a magnetic field, initial stress as well as the rotation. The differences in variable thermal conductivity are also presented at different parameter of thermal conductivity. The numerical results of the field variables are presented graphically to discuss the effect of various parameters of interest. Some special cases are also deduced from the present investigation.

Key Words

diffusion; rotation; initial stress; variable thermal conductivity; memory-dependent derivative

Address

Samia M. Said and Mohamed I.A. Othman: Department of Mathematics, Faculty of Science, Zagazig University, P.O. Box 44519, Zagazig, Egypt Elsayed M. Abd-Elaziz: Ministry of Higher Education, Zagazig Higher Institute of Eng. & Tech., Zagazig, Egypt