An Analysis on Singular Fields around an Interface Edge of Ceramic/Metal Joints Using Moire Interferometry Technique

Characteristics of singular fields around an interface edge between ceramic and soft metallic interlayer were investigated experimentally and theoretically. Displacement fields around the interface edge were measured by means of high-sensitivity moire interferometry. The measured singular fields around the elastic/elastic-plastic interface edge were compared with theoretical results (an elastic/linear hardening materials interface edge prediction and an elastic/power-law hardening materials interface edge prediction). Intensification of stress concentration around the interface edge due to the plastic deformation of the interlayer was clearly observed experimentally and illustrated based on the analysis. A controlling factor for the evolution of singular fields around the elastic/elastic-plastic materials interface edge was proposed and its validity was examined