The Effect of Layer Lay-Up on the Formability of Al/Cu Two Layer Sheet in Electromagnetic Forming Volume 4 - Issue 2

Chao Guo, Dongyang Niu, Jia Liu, Xiaogang Bao and Guohua Xu*

• Department of Orthopedic Surgery, Spine Center, Changzheng Hospital, Second Military Medical, University, China

Received:May 25, 2021;   Published: June 15, 2021

*Corresponding author:Alireza Fallahi Arezoodar, Mechanical Engineering Department, Amirkabir University of Technology, Tehran, Iran

DOI: 10.32474/MAMS.2021.04.000185

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Abstract

Electromagnetic sheet forming is a high-velocity process that the strain rate is considerable. The formability of the material increased in the high strain rate process. In this study, an Al/Cu two- layer sheet’s formability at a high strain rate is investigated using electromagnetic forming. The two-layer sheet produced by the explosive method was used to create different geometry and different strain states in the experimental test. The necking strain was extracted by griding the sheet. The coil is designed to create enough pressure to reach the fracture in the sheet. The driver sheet is also used to create more pressure on the workpiece. The displacement of the sheet and the strain distribution were investigated in a different geometry with different widths. The magnetic pressure is 19% higher in the CA lay-p (Cu near the coil and Al near the die) than the AC lay-up (Al near the coil and Cu near the die). The strain distribution is calculated in a different geometry. The results showed that in low-width geometry, the sheet’s free edges have the maximum strain, and the strain distribution is not uniform in the sheet. The strain distribution is uniform in the workpiece wider than 50 mm because the driver sheet cannot pass through the sheet’s sides. The Al/Cu two-layer sheet’s formability in the AC lay-up is greater than the CA lay-up. This value has reached about 42% in the W75 geometry.

Keywords: Electromagnetic forming; Al/Cu two-layer sheet; strain distribution; formability

Abstract| Introduction| Determining The Magnetic Pressure| Simulation| Coil Design| Mechanical Simulation| Experiment| Results And Discussion| Conclusion| Availability of Data and Materials| Competing Interests| Funding| Authors Contributions| Acknowledgements| References|