Plasticity diagram parametrical identification method under monotonous deformation

The paper deals with the urgent theme of metal deformability in metal forming processes. The known damage accumulation model was used for estimation of the accumulated damage value under plastic deformation. The experimental determination of extreme material deformation, which depends on stress state parameters, is necessary for the model utilization. The plasticity diagram construction method for 0.2 pct carbon steel 20 as an example was developed by using the parametrical identification procedure and tests of sample deformation under hydrostatic pressure.