Formability in bulk metal forming was revisited in a recent paper by considering plasticity, ductile damage and fracture modes for a number of test specimens. One of the test specimens is a flange component showing failure by both fracture mode I and mode III upon compression between two flat parallel planes. The analysis of the flange component was assisted by numerical simulation which will be presented in further details in this presentation. The combination of the relevant ductile damage criterion with an element removal technique allows crack opening in the flange component in agreement with experimental observations. The circumferential location of the crack initiation in the flange is determined by asymmetric deformation and material imperfections. The asymmetric deformation is triggered in the numerical simulation by anisotropy, which is implemented in the employed fiite element computer program.
|Title of host publication||Proceedings of the 7th JSTP International Seminar on Precision Forging|
|Publication status||Published - 2015|