Pages 199-200
In this study, stress intensity factors were investigated and determined by caustics method and photoelastic experiment to clarify the behavior of a crack tip under various biaxiality ratios on the polycarbonate plate with isotropy and anisotropy used as structural components. As result, It was confirmed that only "K_I" affected without receiving the effect by biaxiality ratio, isotropy and anisotropy in case of the crack angle θ=0°under the biaxial loading. It was confirmed that an affects on only K_I in the isotropic polycarbonate plate with crack angle θ=45°under the biaxial load (1 : 1). However, it is proven that simultaneously affected the mode-I and mode-II in the biaxiality ratio is more than 1 : 1. Furthermore, The stress intensity factor value K_II was extremely to rise from over biaxiality ratios of 3.0 by extrusion direction and biaxiality ratio in case of polycarbonate plate with the anisotropy.
