THE PERMEABLE ELEMENT METHOD FOR MODELING OF DEFORMATION PROCESSES INPOROUS AND POWDER MATERIALS - THEORETICAL BASIS AND CHECKING BY EXPERIMENTS

The permeable element method (PEM), as the development of an arbitrary Eulerian-Lagrangian finite element approximation, intended for the de scription of densification of porous bodies, is elaborated. The Euleri an frame of reference, for which the material movement is independent of the movement of a discretizing network, is the basis for the consid eration of the deformation process. The shape of the elements and netw ork movement are deliberately determined from the point of view of con venience for the analysis of the calculation results. Using the PEM, t he pressing of hollow cylinders in a rigid die is considered. The comp uted spatial density distributions are compared with the experimental data obtained, using quantitative metallography analysis. The problem of pressing an article of a stepped shape is solved. The peculiarities of material flow and density distributions are discussed.