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Investigation of springback predition for an aluminum 7000 sheet subjected to press forming

Aluminum 7000 series have been widely used in the aircraft and aerospace applications owing to its advantages of lightweight, high strength, and excellent corrosion resistance. Recently, the sheets have been applied in the automotive engineering in order to reduce the weight of commercial cars. For this demand, press forming is a common forming method used to produce a designed automotive part. However, springback is one of the main reasons to limit applications of the aluminum 7000 series. This study develops several material models that consider important material behavior including Young's modulus, Bauchinger's effect, and material anisotropy on springback prediction for the tested material. These models have been implemented in ABAQUS software to analysis a bending process and estimate springback amount. As a result, the effects of each material behavior on springback were clarified. Based on simulation results, it is found that correctly capturing the Bauchinger's effect is the major key to the success of springback prediction for such kind of material.

Từ khóa: Aluminum alloys, light-weight material, springback, constiutive model, finite element analysis

10 p ovanketv 06/06/2019 304 1

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