Authors: W W Zhang S Cong
Publish Date: 2015/12/14
Volume: 86, Issue: 1-4, Pages: 427-435
Abstract
Stainless steel sheet has a good forming performance due to its perfect strain hardening behavior In order to predict the hydroformability of stainless steel sheet SUS304 GursonTvergaardNeedleman GTN ductile damage model is used to describe the failure behavior under the condition of complicated stress state GTN damage parameters were identified by the comparison between simulation and experiments according to the hybrid methods including scanning electron microscope SEM PlackettBurman design PBD and response surface methodology RSM Then verification of the obtained damage parameters by experimental researches on dieless hydrobulging of ellipsoidal shell and sheet hydrobulging was carried out and the hydroformability and failure behavior were mainly discussed It is shown that the GTN ductile damage model can be applied to evaluate the fracture during hydrobulging It is also experimentally proved that the hybrid method containing SEM PBD and RSM is a feasible to predict the damage parameters
Keywords: