Analysis of free vibrations in transradially isotropic spherically symmetric thermoelastic spheres

Abstract

Purpose

The purpose of this manuscript is to study the vibration characteristics of the spherically symmetric solid and hollow spheres poised of a homogeneous thermoelastic material, based on the three dimensional coupled thermoelasticity.

Design/methodology/approach

In this paper, matrix Fröbenius series solution is used to derive the frequency equations, for the field functions. Results have been applied on rigidly fixed boundary conditions.

Findings

The main finding of this paper is that the frequency of vibration of spherically symmetric sphere (structure is independent of theta and phi) increases with the increase of radius, for solid spheres and for hollow spheres with thickness to mean radius ratio. Deformation in the given materials increases with thickness to mean radius ratio of the hollow sphere.

Originality/value

A numerical simulation has been done with the help of functional iteration method for solid and hollow thermoelastic spheres made of zinc and poly methyl meth acrylate materials for different boundary conditions. The computer simulated results in contempt of frequency, damping of vibration modes and displacement have been obtained graphically and compared with the existed results.

Citation

Sharma, N. (2020), "Analysis of free vibrations in transradially isotropic spherically symmetric thermoelastic spheres", Multidiscipline Modeling in Materials and Structures, Vol. 16 No. 6, pp. 1631-1650. https://doi.org/10.1108/MMMS-11-2019-0199