Research on 7050-T7451 Shear Angle Correction Model Based on Anisotropic Features

With Oxley orthogonal cutting experiments, cutting parameters such as cutting force and shear angle are obtained according to the anisotropic characteristics of the material. A constitutive model of aluminum alloy 7050-T7451 was constructed by using the Split-Hopkinson pressure bar (SHPB) dynamic compression test and the inverse method to introduce the spatial angle. The high-speed cutting finite element simulation was performed based on the finite element DEFORM software. The shear angle obtained by Buda criterion is compared with that obtained by traditional shear angle model and simulation. The result showed that the shear angle decreases first and then increases as the forming angle increases. Based on the comparison error, the traditional shear angle model was modified, and a shear angle model capable of fully characterizing the anisotropy of aviation aluminum alloy 7050-T7451 was obtained.