The material parameters of a foam material must be determined from experimental results, namely the resultant reaction force exerted by a cubic sample on a rigid base. The example illustrates the following features: how to do parameter identification (point-based Mean Squared Error composite function, history-based Mean Squared Error composite function) and multiple simulation models in the same optimization problem (multi-case).
The Bauschinger effect is significant for the automotive sheet steels. The phenomenon is observed under cyclic loading which results in a hysteretic stress-strain curve. The nature of the hysteretic curve complicates teh curve matching required to identify the material parameters and therefore an approach which is more sofisticated than the ordinate-based matching is required. For this purpose, a Curve mapping algorithm is used.