MIXED-MODE FRACTURE OF ASYMMETRIC INTERFACES

摘要

A problem of evergrowing importance, crack propagation at interfaces between dissimilar materials, has been studied analytically, numerically and experimentally. An asymmmetric double cantilever beam (ADCB) has been used where a composite is bonded against a composite or aluminium base. For such a configuration, crack propagation is governed by a mixed-mode state of stress (modes I and II). The ratio of crack opening (mode I) and in-plane shear (mode II) changes with specimen configuration and crack extension. The present study is primarily concerned with the problem of mixed-mode fracture, especially where such failure occurs along a plane of potential weakness such as a bimaterial interface.