本文介绍和评述了塑性理论的Drucker公设和公设,并从这些公设出发,分别在应力空间和应变空间讨论了加载函数的外凸性,正交法则和加载准则,以及本构关系。对比在两个空间中得到的相应关系,可以看出公设以及相应地在应变空间表述本构性质具有更广泛的适用性。 This paper introduces and reviews Drucker’s public design and public design of plasticity theory. Starting from these public settings, the convexity, orthogonality and loading criteria of the load function, as well as the constitutive relation are discussed in stress space and strain space. Comparing the corresponding relations obtained in the two spaces, it can be seen that the public design and the corresponding description of constitutive properties in the strain space have more extensive applicability.