Exact solution for thermoelastoplastic behavior of thick-walled functionally graded sphere under combined pressure and temperature gradient loading. Issue 9 (1st September 2016)

• Record Type: Journal Article
• Authors: Parvizi, Ali; Alikarami, Shahryar; Asgari, Mansour
• Is Part Of: Journal of thermal stresses. Volume 39:Issue 9(2016)
• Page Start: 1152
• Page End: 1170
• Publication Date: 2016-09-01
• Subjects: Combined pressure and thermal loadings -- elastoplastic analysis -- FEM -- thick-walled FG sphere; Thermal stresses -- Periodicals; 620.1121
• DOI: 10.1080/01495739.2016.1188614
• Languages: English
• ISSNs: 0149-5739

Abstract

ABSTRACT: Considering the combined uniform pressure and thermal loading condition, a closed form analytical thermoelastoplastic solution for thick-walled spheres made of functionally graded materials (FGMs) is presented in this article. Taking into account three different scenarios for the onset of yielding, the formulas to determine stress field in both elastic and plastic zones of FG sphere are generated and the radius of the plastic zone is obtained for combined loading. It is shown that the effective stress in the sphere subjected to combined loading decreases significantly when the FG materials are used. Moreover, the FG sphere is simulated entirely using ABAQUS/Explicit software. Based on the good agreement between the results from present theoretical analysis and those from finite element simulation, the accuracy of the present analysis is verified.