Peridynamic analysis of materials interface fracture with thermal effect

Abstract

A thermomechanical peridynamic framework is established for fracture analysis of dissimilar material interface coupled with residual thermal effect. In this frame, an extended peridynamic mixed-mode failure model considering thermal effect is proposed for interfacial fracture prediction, and the peridynamics-based methods for interface crack energy release rate and mode mixity computations are given. Meanwhile, a new peridynamic contact model is proposed for frictional contact modeling of crack surfaces. Then, three examples of the single edge-notched bimaterial (SENB), asymmetric bimaterial cantilever beams (ABCB) and four-point shearing (FPS) tests, are analyzed for the model verification and application. The elastic and interfacial fracture behaviors of these tests are predicted by the proposed peridynamic models, and compared to the analytical and the FEM solutions. The results show that the proposed peridynamic models can successfully predict the failure characteristics of materials interface, and capture the role of residual thermal effect on the interfacial fracture.