Christensen failure criterion

The Christensen failure criterion is a criterion used to predict the failure of materials, particularly in the context of composite materials and other complex materials. It is named after the American engineer and materials scientist, R. M. Christensen. The criterion is based on the idea that failure in materials can be characterized by interactions between various stress states. Specifically, it is often expressed in terms of a failure surface that describes the conditions under which a material fails due to combined loading.