Plasticity Criteria: Von Mise and Tresca

This lecture covers the fundamental concept of plasticity criteria, which are essential in estimating the stresses required for deformation processes. The criteria, such as Von Mise and Tresca, determine whether a material has reached its plastic limit based on deformation state and permanent deformation levels. The lecture also discusses the significance of energy, hardness, compression, and shear in plasticity analysis. Various control states and constraints are examined, including isotropy and different stress levels. The expression of Von Mise criterion in terms of stress deviator and equivalent stress is explored, along with comparisons between different criteria.