广义屈服准则

General Yield Criterion

本文提出了一个新的屈服准则——广义屈服准则,新准则中包含了应力张量第一不变量J1和应力偏张量第二及第三不变量J21及J31的综合作用,从物理概念上看,新准则反映了平均正应力、各主剪应力及应变类型对屈服应力的综合影响。新准则的优点是它可适用于拉压性能不同材料、多孔材料及不同变形工序等的屈服判据。另外,本文还指出Tresca准则、双剪应力准则及Mises等准则仅为所推荐准则的一个特例。

A new yield criteron,General Yield Criterion, is put forword in this paper, which gives consideration to the synthetic effects of first invariant J1 of stress tensor, second and third invariants J2' and J3' of stress deviator. In view of physical concept, the new yield criterion reflects the synthetic effect of mean normal stress, main shear stresses and strain type.The advantage of the new yield criterion is that it can be used as the yield condition of material with different properties of tension and compression, porous material and different forming processes.It is proved. 'Tre-sca Criterion' and 'Mises Criterion' are the special cases of the new yieldcriterion.