Working group

Material Behaviour at High Strain Rates

Experimental setup for high speed loading

Safety relevant processes such as crashes of automobiles or aeroplanes, detonations of tanks or pipes often cause a high speed loading of material. The induced high strain rates of the material are also characteristic for impacts and high speed forming processes.

For simulation and safety assessment of such processes knowledge of material behaviour is important.

Fields of competence

Experimental investigations of predominantly metallic materials

for identification and calibration of material and damage models under high speed loading
under technological loading (e.g. bending or deep drawing)
and metallic components under special operating conditions according to the customer requirements or within the scope of failure analysis

High speed tensile test of a steel specimen at 1000 °C and 10m/s (video, mpg, 430 kB)

Key activities

Our objective is the identification of material behaviour under high speed loading:

Characterization of homogeneous deformation behaviour; yield curves (pdf, 81 kB) up to 1200 °C and determination of technological parameters R_p0,2, R_m, A_g
Characterization of inhomogeneous deformations by means of
- strain field measurement (video, mpg, 204 kB)
- temperature field measurement (video, mpg, 196 kB)
Characterization of material damage; for example detection of the damage starting point (pdf, 251 kB)