コースティックス法による直交異方性CFRP積層材の応力拡大係数の測定

抄録

The optical method of caustics is a useful technique for determining the stress intensity factor K. The method has been mainly applied to isotropic materials. For anisotropic materials, however, the method has not been much studied. In this paper, the method of caustics is examined for a highly orthotropic unidirectionally reinforced carbonepoxy composite under mode I loading by using a coating technique, and the results are compared with those of finite element analysis. As a result, it was found possible to apply the method of caustics to orthotropic CFRP laminate material.