Nonlinear elasto-plastic analysis of a sandwich cylindrical shell with core plasticity included

Abstract

In this paper, static response of a sandwich cylindrical shell under elasto-plastic deformation is investigated. The faces are made of some isotropic materials and the core is made of an orthotropic material both with linear work hardening behavior. The faces are modeled as thin cylindrical shells obeying the Kirchhoff-Love assumptions. The core material is modeled as a special orthotropic solid in which its in-plane stresses are assumed to be negligible. The Prandtl-Reuss plastic flow theory and von Mises yield criterion are used in the analysis. The governing equations are derived using the principle of virtual displacements. Using Ritz method, the equations are solved for deformation components. After verification of the results, the analysis is extended by changing the values of different parameters.

Elastic-plastic behavior of sandwich cylindrical shell panels with a flexible core

“…Comprehensive reviews of various analytical and numerical studies of sandwich structures can be found in Noor et al., 4 Librescu and Hause, 5 Vinson, 6 and Altenbach 7 . Moreover, a review of some publications considering the elastic-plastic behavior of sandwich structures can be found in Kargarnovin and Shokrollahi 8 where Kargarnovin and Shokrollahi studied simply supported sandwich cylindrical shell panels, undergoing elastic-plastic deformation using Ritz method.…”