Drucker-Prager criterion

The Drucker-Prager criterion is a model used in engineering and materials science to predict how certain materials behave under stress, especially when they are in a plastic or yielding state, like soil or rocks. It helps determine when a material will fail or deform permanently under pressure. The criterion extends the concepts of pressure and shear stress, focusing on how materials respond to combinations of these forces. It is particularly valuable in fields like civil engineering, where understanding the stability of structures and materials under various loads is crucial for safety and design.