Finite-Element Analysis of Residual Stresses of Ceramic/Metal Joints : Elastic-Plastic Singularity of Residual Stresses

Abstract

A two-dimensional finite-element analysis was perfomed to study an elastic-plastic singularity of residual stresses in a ceramic/metal joint. The comparison of the elastic singularity by finite-elment analysis with the idealized theoretical results showed that the elastic singularity of residual stresses in the ceramics side was characterized by elastic properties of the ceramics and the insert material. The yielding of the insert material resulted in the change of the singularity. The exponent of the elastic-plastic singularity was larger than that of the elastic singularity. This elastic-plastic singularity can be approximately estimated by a simplified elastic-plastic analysis.