The paper is devoted to the modeling of processes of inelastic
nonhydrostatic compaction and decompaction of low porosity geomaterials
such that each pore can be considered as an isolated cavity in a solid
matrix. A real material containing a large number of noninteracting
pores is replaced at a microscopic level by an equivalent homogeneous
medium containing a single pore inclusion. Attention is paid to the case
where cylindrical pores oriented perpendicularly to an applied
nonhydrostatic load are present in the material. Along with the
elastoplastic response of the medium, viscous effects are considered.
The effect of shear stresses on compaction and decompaction of porous
geomaterials is studied. The dependence of effective material parameters
on the properties of components is examined.