This research deals with an experimental method to predict the interfacial fracture strength of a bimaterial specimen. The goal of this study is to experimentally validate the probability of failures predicated using the modified Weibull failure formulation developed by the first two authors. The probability of failure of the bimaterial components using the modified Weibull failure theory requires evaluating the Weibull parameter of the interfacial strength. For this, a standard fracture test protocol for the three-point bending was examined to evaluate the interfacial fracture toughness of the bimaterial specimens. In this experiment, bimaterial specimens were fabricated by joining of Polymethyl-methacrylate and Polycarbonate using Methylene Chloride.