The invention relates to a three-dimensional multi-particle
finite element simulation method for predicting high-speed pressing forming performance of
metal powder, which comprises the following steps of: generating an initial random stacking model of three-dimensional spherical particles by using discrete element
software, and extracting central coordinates and corresponding
diameter data of the spherical particles; running a python script program in
finite element software Abaqus, automatically completing modeling of spherical particle parts with different diameters, and generating an
assembly; setting material attributes of the particles; each
powder particle part is automatically divided into hexahedral structure grids with a reasonable number; setting and displaying dynamic analysis steps; setting boundary conditions; automatically setting contact attributes and contact pairs between
metal powder balls and between the balls and the side wall of the mold; and solving, calculating and post-
processing. According to the method, a large amount of complex finite
element modeling work such as generation and
assembly of a multi-particle part, grid division and contact setting is automatically completed, the modeling efficiency is greatly improved, the modeling
correctness is guaranteed, the micro-mechanical characteristics of powder pressing are comprehensively analyzed, and the method is suitable for large-scale popularization and application. And the quantitative relation between the compact density and the
impact energy per
unit mass is accurately established, so that the purpose of predicting the high-speed pressing performance of the
metal powder is achieved.