本文根据作者于1961年提出的双剪应力屈服准则和1962年提出的普遍形式的双剪应力强度理论,提出了一个适用性更广的双剪应力强度理论.它以十二面体的两个较大剪应力为基础,进一步考虑到十二面体上相应的正应力的影响,把双剪应力准则推广到更大的范围,使它不仅适合于塑性材料的屈服流动,并且也适合于脆性材料的断裂破坏. Based on the double shear stress yield criterion proposed by the author in 1961 and the universal form of double shear stress strength theory proposed by the author in 1962, this paper proposes a more applicable dual shear stress strength theory. It uses two dodecahedrons in two comparisons. Based on the large shear stress, taking into account the influence of the corresponding normal stress on the dodecahedron, the double shear stress criterion is extended to a larger range, making it not only suitable for the yielding flow of plastic materials, but also suitable for brittle materials. Break failure.