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Simulation and analysis of self-piercing riveting process in aluminum sheets

SUI Bo,DU Dong,CHANG Bao-hua,HUANG Hua,WANG Li(Department of Mechanical Engineering,Tsinghua University,Key Laboratory for Advanced Manufacturing by Materials Processing Technology,Beijing 100084,China)  
To study the forming process of self-piercing riveted joint,a finite element method is employed to simulate the riveting process of 1.15mm AA6016T4+1.5mm AA5182O sheets.The validity of this method is verified by the good agreement between the calculation results and the experimental results.The force of punch and die,forming of rivet-lock and distortion of aluminum sheets are investigated.The simulation results show that:the deformation of rivet shank is the key factor that affects the punch load;the filling of the rivet-tubular makes it easy for the force to be applied on the inner face of the rivet-shank,which conducive the forming of rivet-lock;the distortion of riveted sheets is mainly affected by the binder-force and the diameter of blank holder.
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