crushing tubes and extruded profiles

This sonar-simulation shows a crushing process of an aluminum tube. The piston is accelerated by a strong force while its max. speed is limited to 10 m/s. Aluminum tube properties are:

tube diameter = 66 mm
tube thickness = 0.6 mm
tube length = 132 mm (L/D ratio = 2)
material model with isotropic hardening

The next 3 movies show the same simulation with different aluminum sheet thickness.

sheet thickness = 0.3 mm

sheet thickness = 0.2 mm

sheet thickness = 0.1 mm