Nonlinear elastic behavior and effective parameters of materials with pores and flaw-like defects

A nonlinear-elastic isotropic model is formulated and effective characteristics of the material containing defects in the form of cracks and pores are determined. The expression for the specific energy of deformation, which is the second-degree homogeneous function concerning the invariants of the deformation tensor forms the model base. The relationship between the macroscopic parameters of the model, the content of defects, and the morphology of the material is established by the methods of computational micromechanics. The model allows taking into account elastic dilatancy, and its limiting state corresponds to the Cam–Clay condition.