Damage analysis in mechanical clinching: Experimental and numerical study

摘要: Abstract A numerical model describing the evolution of ductile damage was developed to predict onset fracture during clinch joining thin aluminium AA6082-T6 sheets. The calibrated and validated using instrumented punch-out tests in order increase reliability robustness parameter. An inverse analysis performed (by varying parameter) by minimizing difference between experimental prediction concerning load-stroke curves geometries punched cross-sections. Then, a mechanical clinching parameter compared with clinched connections. results show that enables cracks critical regions be predicted. are punch-sided sheet neck die-sided bulge. established provides viable means for optimizing geometry tools so as improve behaviour joints maximizing undercut reducing thinning) other than preventing on joints.