2] > 0) can be modelled by tensile test, cross tensile test, Erichsen test, bulge test, Marciniak test, Nakazima test, etc.
Technological characteristics obtained by Erichsen test and cup test as well as these values calculated for selected materials by numerical simulation are shown in Table 3.
The numerical simulation of Erichsen test and cup test for selected materials were realised in order to compare experimental and calculated values.
A high value of the hardening coefficient indicates that the material supports a maximum uniform deformation, and the maximum local deformations are lower due to the deformation process that appears during the Erichsen test.
The limits of the parameters obtained after tensile tests and the Erichsen tests are presented in Table 1.