Subsonic interfacial fracture using strain gages in isotropic-orthotropic bimaterial

摘要

An experimental study has been conducted in which strain fields were used,to investigate the behavior of subsonic crack propagation along the interface of an isotropic-orthotropic bimaterial system. Strain field equations were developed from available field equations and critically evaluated in a parametric study to identify optimum strain gage location and orientation. Bimaterial specimens were prepared with PSM-1 polycarbonate and Scotchply(R) 1002 unidirectional, glass-fiber-reinforced, epoxy composite. Dynamic experiments were conducted using these specimen's with strain gages mounted on the composite half to obtain values of the dynamic complex stress intensity factor, K = K-1 + iK(2), in the region of the crack tip while photoelasticity was used on the PSM-1 half. Results show that the trend and magnitude of K obtained using strain gages compare favorably with those obtained using photoelasticity. (C) 2002 Elsevier Science Ltd. All rights reserved. [References: 18]