Journal Article

Comparison of electromagnetic-driven stamping and electromagnetic forming limit curves for AA5182-O aluminum alloy sheet

Wu, Jinjie, Liu, Jili, Li, Jiaqi, Huang, Shangyu, Liu, Wei, Meng, Zhenghua

2023

Overview

The strain paths of electromagnetic forming limit curve are usually limited due to the restricted design of coil, die, or workpiece. The electromagnetic-driven stamping was suggested to obtain the high-speed forming limit curve of AA5182-O aluminum alloy sheet. The hemispherical punch was pushed by the drive plate with the Lorentz forces to impact on the workpiece. The cross-sectional method was used to determine the experimental limit strains of workpieces. The electromagnetic and mechanical fields were sequentially coupled for numerical simulation of the electromagnetic-driven stamping experiment, and the equivalent plastic strain increment ratios of the necking and safe zones were calculated to determine the simulated limit strains. A series of linear strain paths were attained to contain the uniaxial tension to biaxial tension states. The experimental and simulated forming limit curves showed good agreement to validate the electromagnetic-driven stamping experiment. The electromagnetic-driven forming limit curve was compared with the quasi-static and electromagnetic forming limit curves. Although the electromagnetic-driven forming limit curve is lower than the electromagnetic one, it is higher than the quasi-static one.

• Publisher: Springer Nature B.V
• Subject: Aluminum alloys / Aluminum base alloys / Axial stress / Electromagnetic forming / Forming limit diagrams / Limit strain / Lorentz force / Metal sheets / Necking / Plastic deformation / Simulation / Stamping / Workpieces