The authors construct a continuum approximation for the model of a medium with internal structure and internal self-balancing stresses. The presupposition of diffeomorphism, i.e. existence of partial space derivatives of displacements is largely slackened. The information brought to the closed model of a geomedium by this presupposition is comparable with the information brought by the constitutive equations. The new model includes the local bends of grains of the skeleton, plasticity and the elastic strains of the binding medium in the pore space. The model is of a gradient type.

中文翻译：

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具有内部自平衡应力的岩石弹塑性模型。连续近似

作者构建了具有内部结构和内部自平衡应力的介质模型的连续近似。微分同胚的前提，即位移的偏空间导数的存在，在很大程度上松懈了。由这个预设带入几何介质封闭模型的信息与由本构方程带入的信息是可比的。新模型包括骨架颗粒的局部弯曲、孔隙空间中结合介质的塑性和弹性应变。该模型是梯度类型的。