This situation makes the concept of elementary volume and Saint-Venant's deformationcompatibilitycondition used in continuum mechanics problematic.
这种情况使连续介质力学中使用的基本体元的概念及圣维南变形协调条件受到了置疑。
2
And then the governing equations of the block dynamic system are deduced on the basis of the virtual work principle, the deformationcompatibilitycondition and the constitutive relations.