Hosford yield criterion

The Hosford yield criterion is a function that is used to determine whether a material has undergone plastic yielding under the action of stress. The Hosford yield criterion is a function that is used to determine whether a material has undergone plastic yielding under the action of stress. The Hosford yield criterion for isotropic materials is a generalization of the von Mises yield criterion. It has the form where σ i {displaystyle sigma _{i}} , i=1,2,3 are the principal stresses, n {displaystyle n} is a material-dependent exponent and σ y {displaystyle sigma _{y}} is the yield stress in uniaxial tension/compression.