Incremental air-bending forming simulation of sheet metal based on anisotropic plasticity theory

作者：Fu Zemin^*; Hu Dachao; Liu Xuhui

来源：Optoelectronics and Advanced Materials-Rapid Communications, 2011, 5(12): 1312-1319.

• Air-bending
• Sheet metal incremental forming
• Anisotropic material constitutive model
• Finite element simulation

Modeling of multiple-step incremental air-bending forming processes requires an accurate description of anisotropic material behavior. This paper describes the finite element (FE) simulation results obtained using Hill's quadratic anisotropic yield function under the conditions of plane stress and plane strain, respectively. The single-step air-bending and semiellipse-shaped workpiece multiple-step air-bending tests were modeled for WELDOX700, WELDOX900 and OPTIM960 anisotropic sheets, using the improved Hill's yield function embedded into ABAQUS. Then, the air-bending springback, thickness strain along the transverse direction and parts profiles were computed. The studies show that the results predicted with Hill's yielding criterion under the plane strain condition are in much better agreement with experiment data than those predicted with Hill's yielding criterion under the plane stress condition. It can be taken as a valuable mathematical tool used for multiple-step incremental air-bending forming simulation of anisotropic sheet metals.

• 出版日期2011-12
• 单位上海应用技术大学