4.1 Tensile test on steel.
For standard steel, the Johnson-Cook material law is, most of the time, the selected one. This is an elasto-plastic law which includes strain rate and temperature effects:
p = plastic strain
= strain rate
T = Temperature (in Kelvin degrees)
The plasticity hardening exponent
n must be less than 1.
The material behavior is coupled with the Johnson-Cook rupture criterion
Results: rupture under tension but not under compression as expected.
Selecting the tabulated material law coupled with the Johnson-Cook rupture model gives the same behavior and also rupture.