Study on Interfacial Crack Kinking Fracture Under Mixed Mode Loading

Abstract

In this study, the interfacial crack kinking behavior of bimaterial specimens are investigated. The bimaterial specimen consist of epoxy and aluminum. To produce various mixed-mode states, the loading angle is changed systematically from 0° to 180°. The fracture mechanics parameters for interfacial crack in bimaterial specimens are evaluated by the aid of finite element analyses. All kinked fractures occurred at loading angle ≧120°. Fractures energy supply for interfacial crack is discussed by the measurements of separated J integral. The component separation method is used to estimate stress intensity factor for interfacial crack. In this paper, the stress intensity factors at the characteristic length 1=2a are calculated.