The article deals with the prediction of pressability results (distribution of residual stress or plastic strain in the workpiece, thickness distribution in the workpiece, etc.) of deep-drawing (DC 04, DC 05) and chrome-nickel (DIN 1.4301) sheets. For the needs of computer numerical simulation, material parameters for individual sheets were calculated using Matlab software, and the simulation itself was performed using Comsol Multiphysics software. In this model, a flat metal sheet is pressed onto a curved die with a similarly shaped punch. From a simulation point of view, the problem is significantly nonlinear due to contact, large strain plasticity, and geometric nonlinearity. In order for the solution to be convergent, it is necessary: carefully select the source and target in pairs of contacts, parametrically use steps that are small enough to avoid the divergence of the solution, to calculate the thickness of the deformed shape, a non-local projection coupling is used to define the variable th - the augmented Lagrange method [COMSOL Multiphysics 2020].
Science Journal 