Material data for modelling
Fracture lotus evaluation
Fracture locus is the ductile failure criterion, which expresses the material behaviour under the wide range of different triaxiality states. Therefore, set of different specimen’s geometries are tested. Based on the results, fracture locus can be expressed as a triaxiality-equivalent plastic strain dependency (2D), or triaxiality-equivalent plastic strain-Lode parameter diagram (3D).
Fracture strain measurements
Improved fracture criteria for sheet metal forming and failure simulation (edge cracking, etc.). The method is based on the measurement of local fracture strains on the fracture surface of notched and pre-cracked specimens.