Optimization of blind riveting process parameters of aluminum alloy based on finite element simulation

Blind rivets hold significant potential for application in the automotive and aerospace industries. This study uses the finite element method to create a simulation model of the riveting for aluminum blind rivets. The research explores how hole diameter and interlayer thickness of rivets affect riveting quality from various perspectives, including joint sizes, variations in stress field and equivalent stress, contact conditions between components, and changes in contact stress. The findings indicate that after riveting, the joint sizes (protrusion sizes of the mandrel and locking ring) enlarge with increasing hole diameter and diminish with increasing interlayer thickness. The contact stress between the sleeve and mandrel, as well as between the sleeve and the connecting plate, increases with larger hole diameters and initially rises before stabilizing with greater interlayer thickness. Additionally, the contact stress between the locking ring and mandrel and between the locking ring and sleeve first increases and then decreases as both the hole diameter and interlayer thickness increase.