Finite Element Simulation of Residual Stress in Pre-stretching Thick-plates of 7075 Aluminum Alloy After Quenching
A quenching process for 7075 aluminum plates was simulated by MSC.MARC—a powerful FEA program.With FEA based on quenched stress,supposing the clamp region of jaw is ideal stiffness,according to material mechanics,plastic deformation of metal and so on,making use of the method of finite element simulation,the stretching model under above-mentioned was built.The effect of different pre-stretching volume and different pre-stretching velocity on reducing residual stress in workpiece was simulated and the cutting region was calculated.The results show that,when the pre-stretched volume is about 3%,the residual stress is about 96%,and the cutting region is about 21.6%.All these quantities agree well with the manufacturing techniques of aviation aluminum alloy thick-plate.