Simulation of forming prediction for 5000 series aluminum alloy using finite element analysis

Abstract

Forming limit prediction of 5182-O aluminum alloy sheet was carried out by using finite element analysis. JSTAMP/NV was used in the finite element analysis. Length of aluminum specimen was 120 mm, and the width was varied from 10 to 120 mm, and the thickness was 1.0 mm. Stretching test was operated by Erichsen test. Forming limit prediction and necking limit prediction by using finite element analysis was proposed. Forming limit diagram (FLD) of analytical results were indicated relatively good conformability with the FLD of experimental results. Also, spherical stretch forming experiments of 5182-O aluminum alloy sheet were carried out to research the formability on biaxial stress by several companies. The forming simulations were carried out using commercial software PAM-STAMP 2G. Effects of friction coefficient and yield function were investigated in the simulation. Simulation results by using YLD-2000 yield function agreed well with experimental results compared with that of Hill 48 yield function. Those were benefit for analytical simulations of sheet metal forming.