Yieldinduced

Yieldinduced refers to phenomena that arise as a consequence of a material yielding, that is, when the applied stress reaches and surpasses the material’s yield point and plastic deformation begins. The term is used to describe effects that only occur after yielding has begun, including permanent shape changes, residual stresses, and changes in mechanical properties such as strength and ductility. Yieldinduced behavior is central to understanding how materials behave during and after elastic-plastic transition.

Mechanisms behind yieldinduced phenomena include the initiation and motion of dislocations, which enable plastic flow once the yield criterion is satisfied. Common yield criteria, such as von Mises or Tresca, predict when yielding begins under complex stress states. Once yielding occurs, processes like work hardening (or strain hardening) can increase the apparent strength of the material, while localized yielding can lead to necking, buckling, or cracking depending on geometry and loading conditions. The distribution of hydrostatic and deviatoric stresses influences post-yield responses, including residual stress development upon unloading.

Applications and implications of yieldinduced behavior span metal forming, structural design, and failure analysis. In forming processes, controlled yieldinduced plasticity shapes parts efficiently, while in structural components, unintended yieldinduced deformation or buckling can compromise safety. Modeling yieldinduced effects typically involves elastic-plastic constitutive laws, yield surfaces, and hardening rules implemented in finite element analyses to predict onset of yield, subsequent deformation, and potential failure.