A preliminary investigation limited to stress freezing materials was undertaken in order to develop a test method for estimating the stress intensity factor (SIF) distribution along the border of cracks in the bondline of a bimaterial specimen. It was desired to measure the influence of curing stress and mixed mode effects for such specimens. A single edge notched specimen was selected, and a test procedure was devised for isolating the curing stress effect at the bondline for Mode I. Subsequently, mixed mode tests were conducted and the SIF distributions for K 1 and K 2 were obtained. It was found that the level of the SIF values was increased by the bondline in cracked homogeneous bondline specimens for bondlines nearly normal to the applied load, but that this effect was not increased in bonded bimaterial specimens. For larger angles of inclination to a normal to the applied load, no increase in the SIF above the homogeneous result was found.