Plasticity

Plasticity, in the context of continuum mechanics, refers to the behavior of materials that undergo permanent deformation when subjected to forces beyond a certain threshold. When stress is applied, materials typically deform elastically, meaning they return to their original shape once the force is removed. However, if the stress exceeds a critical level, the material deforms plastically, resulting in a lasting change in shape, akin to molding clay. This behavior is crucial in engineering and construction, as it helps predict how structures will respond under different loads and ensures safety and durability in design.