Elastoplastic analysis of nonlinearly hardening variable thickness annular disks under external pressure

Eraslan A., Orcan Y., Guven U.

MECHANICS RESEARCH COMMUNICATIONS, vol.32, no.3, pp.306-315, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 32 Issue: 3
  • Publication Date: 2005
  • Doi Number: 10.1016/j.mechrescom.2004.06.002
  • Journal Name: MECHANICS RESEARCH COMMUNICATIONS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.306-315
  • Keywords: variable thickness, external pressure, nonlinear hardening, residual stresses, von Mises criterion, STRESS-DISTRIBUTION
  • Middle East Technical University Affiliated: Yes

Abstract

Based on von Mises' yield criterion, deformation theory of plasticity and Swift's hardening law, elasto-plastic deformation of variable thickness annular disks subjected to external pressure is studied. A nonlinear shooting method using Newton's iterations with numerically approximated tangent is designed for the solution of the problem. Considering a thickness profile in the form of a general parabolic function, the condition of occurrence of plastic deformation at the inner and outer edges of the annular disk is investigated. A critical disk profile is determined and the corresponding elastic-plastic stresses as well as the residual stress distribution upon removal of the applied pressure are computed and discussed. (c) 2004 Elsevier Ltd. All rights reserved.