Abstract
The specimen materials used in this research are isotropic material, orthotropic material and bimaterials. The static photoelastic experiment was applied to them. And then the specimens used in photoelastic experiment were fractured under static load. The static photoelastic experimental hybrid method was introduced and it's validity have been assured. The static photoelastic experimental hybrid method was applied to the minimum strain energy density criterion (MSEDC) and the maximum tangential stress criterion (MTSC). And then, crack propagation criterion by the static photoelastic hybrid method was introduced. The theoretical initial angles of crack propagation were calculated using the crack propagation criterion introduced in this research. The experimental initial angles of crack propagation were measured from the fractured specimen. Comparing the experimental initial angles with the theoretical initial angles of crack propagation, the validity of the crack propagation criterion by the static photoelastic experimental hybrid method was assured.
