COMPUTER SIMULATION OF THE DRAWING PROCESSES OF A RECTANGULAR SECTION SOLID AND SINTERED SAMPLES IN A WEDGE- SHAPED DIE
Modeling and investigation of the stress-strain state of the drawing processes of a solid and sintered samples of rectangular section in a wedge-shaped die in the automatic program environment (APE) “ABAQUS” under the conditions of plane deformation are carried out. The zones of intensity distribution of stresses and strains, and also the components of the stress state: axial(tensile), compressed from the die side, transverse and shear stresses are obtained. In accordance with this, the values of the components of the stress-strain state and the average normal stress of the sample in the axial and contact with the die nodes are obtained. The porosity change values of the material for the sintered sample have also been determined using the deformation theory of plasticity of porous materials (DTPPM). Simulation of the drawing process in APE also makes it possible to obtain averaged values of the sample in the horizontal nodes of the grid direction. The simulation results have been compared with the values of the solved problem by the analytical method, since it gives a general idea of the distribution of stresses and porosity changes in the metal. When studying the transverse stresses in a sintered sample by the analytical method for different initial relative densities of the material, the DTPPM stress and strain relation formula is used, the obtained results are compared with the simulation data in “ABAQUS”. A comparative analysis of the obtained results was carried out and it was shown that when solving technological problems using ABAQUS APE, the results of drawing a rectangular section sample in a wedge-shaped die with sufficient accuracy coincide with the data obtained when solving the problem by the analytical method using DTPPM.