Numerical simulation of viscous adhesive stress tension test and viscous adhesive stress model

A new model is proposed to accurately calculate the viscous adhesive stress at the interface of viscous medium and sheet metal in viscous pressure forming (VPF) through analyzing the influences of pressure, shear strain rate and temperature of viscous medium on the viscous adhesive stress. By introducing the developed viscous adhesive stress model into finite element analysis program, the viscous adhesive stress tensile test is simulated. The numerical simulation results are compared with experimental ones, and then the developed model is verified. Research results show that the elongation and strain distribution of tensile test sample predicted by numerical simulation have a good agreement with those by experimental measurement. Thus it can be concluded that the developed viscous adhesive stress model can accurately reflect the characteristic of viscous adhesive stress and provide a model for the accurate numerical simulation of VPF.