The existing method for testing and collecting Stress Corrosion data requires application of externally applied load on the specimen in the corrosive media. We propose a new type of specimen consisting of a bi-beam where two materials having slightly different coefficient of thermal expansions are bonded together and cooled to room temperature such that a self-loaded specimen is produced because of the presence of residual stress. This creates a very stable stress field that is ideal for long-term toughness experiments. A finite element model was developed to design such specimens while ensuring that the crack propagates at a steady state across the specimen. The model was first verified against analytical results for a thin film on a substrate. Then, since non-constant stress intensity factor are desirable for recording a spectrum of response, specimen geometries were investigated to determine the best geometry suitable for such experiments. The results obtained were validated by performing a stress corrosion cracking experiment using Schott B/Soda-lime glass bi-beam in water and the numerical data compares well with the experimental data
