MODELING THE PLASTIC BEHAVIOR OF A POROUS MATERIAL WITH AN INVERSE OPAL STRUCTURE AT LARGE DEFORMATION

Abstract

By means of finite element modeling on a representative cell, the process of irreversible plastic deformation of a porous material with an inverse opal structure was investigated up to the moment when the pore structure becomes almost completely closed. This is important for predicting the preservation of the adsorption and chemical-catalytic functional properties of inverse opal materials during operation and pressure treatment. It was found that the structure of inverse opal retains permeable porous structure even under fairly large deformations. A significant discrepancy was found between the engineering yield criterion of 0.2% residual strain and the physical yield point.