Analysis of Residual Stress of Ceramic/Metal Joint

The two-dimensional elastoplastic analysis was performed to reveal a detail residual stress distribution of ceramic/metal joint specimen using finite element method and X-ray method. The highest tensile residual stress, δx perpendicular to the interface appeared at the edge of the ceramic near the interface. In the vicinity of the interface, the high stress concentration occurs and residual stress distributes three-dimensionally. Therefore, the measured stress distribution differed remarkably from the result of the two-dimensional finite-element analysis. Especially at the center of the specimen near the interface, the residual stress, ox obtained from the finite element analysis was compressive, whereas X-ray measurement yielded tensile δx. Therefore, it is also attempted to investigate the finite element model for the prediction of residual stress δx distributed nearly the interface of joint