A New Nonlinear Yield Criterion

Introduction　　 The yield criteria and strength theories of ma-terials undercombined stresses are importantfoun-dations in the mechanics of solids and the strengthof structures.　　 Two presently popular yield criteria had beenproposed,i.e.those of Tresca and Von Mises.Since then yield criteria have been studied by anumber of investigators,i.e twin- shear stressyield criterion1] ,energy based yield criterion2 ] ,anisotropic criterion3 ] ,Hoek- Brown criterion4] .However,any conceivable …

A New Nonlinear Yield Criterion

Many experimental results show that a wide class of ductile materials obey often nonlinear behavior, thus it is important to propose a nonlinear criterion describing nonlinear behavior of ductile material. A new nonlinear yield criterion was proposed which gives a series of new failure criteria, establishes a relationship among various failure criteria, and encompasses previous yield criteria as special cases or approximations. The criterion is capable of being expressed in a simple mathematical expression and through a particular physical concept, it also agree with some experimental data. It may therefore serve as a possible admissible isotropic yield criterion.