For the convenience of analyzing of elastoplastic problems, isothermal or adiabatic conditions were usually invoked in many kinds of classical material yield theories, e.g.the Tresca yield criterion or the Von Mises yield criterion.In them only stress was employed as the threshold value to define the material's yield point.If there is obvious energy conversion from mechanical work to heat in material deforming, or material itself has the temperature sensitivity, these stress yield criteria would be not sufficient for describing the irrevers...
