Mechanism Based Failure Laws for Graphite/Epoxy Composites

摘要

A significant progress has been made towards achieving the overall goal of developing mechanism-based failure laws for graphite/epoxy laminate under biaxial compression. Microstructural-level mechanisms have been largely uncovered using examination of load-interrupted specimens, including the strength data under different materials axes orientations and in-plane biaxiality ratios. Mechanism-based failure laws for uniaxial compression have also been developed, including a fracture mechanics-based predictive crack density model. New and unusual size effects related to modulus were uncovered, and so were the observations that seem to indicate fiver microbuckling mechanism to be simply end loading related.