INFLUENCE OF THE UNLOADING PATTERN ON THE GROWTH OF GAS-FILLED CRACKS
The paper studies the process of crack growth in a material with gas-filled pores during unloading from external compressive stresses. The variant of directional unloading is considered, when a system of parallel cracks is formed, oriented perpendicular to the direction of the least compression, and uniform all-round unloading, when a system of randomly directed cracks is formed. The effective elastic characteristics of the material for these two cases are estimated. Regularities of crack growth in both cases are revealed depending on the porosity of the material.