Generalized Thermo Elasticity in an Infinite Nonhomogeneous Solid Having a Spherical Cavity Using DPL Model

• 作者: Ahmed Elsayed Abouelrega
• 来源期刊: 应用数学(英文)
• 学科: 数学
• 关键词: GENERALIZED THERMO ELASTICITY NONHOMOGENEOUS Functionally Graded Material (FGM) Laplace Transform Three-Phase-Lag MODEL
• 年，卷（期）: 2011,（5）
• 页码范围: 625-632
• 页数: 8页
• 分类号: O1

摘要

The induced temperature, displacement, and stress fields in an infinite nonhomogeneous elastic medium having a spherical cavity are obtained in the context dual-phase-lag model. The surface of the cavity is stress free and is subjected to a thermal shock. The material is elastic and has an in?homogeneity in the radial direction. The type of non homogeneity is such that the elastic constants, thermal conductivity and density are propor?tional to the nth power of the radial distance. The solutions are obtained analytically employing the Laplace transform technique. The numerical inversion of the transforms is carried out using Fourier series expansions. The stresses, temperature and displacement are computed and presented graphically. A comparison of the results for different theories is presented.