Abstract
Damage evolution has a great influence on the formability and mechanical property of part. The deformation behaviour and damage evolution of aluminium alloy sheet in the electromagnetic forming processes with uniform pressure actuator were experimentally and numerically investigated. The influences of the discharge voltage and impacting distance on the impacting effects between the aluminium alloy sheet and die wall were firstly compared in electromagnetic forming process. With the elevated discharge voltage and impacting distance, the impacting velocity and contacting pressure increased, and the stress triaxiality and damage accumulation of aluminium alloy sheet decreased. Then, the influences of the pre-straining level on the damage evolution of aluminium alloy sheet were presented in hybrid electromagnetic forming process. The initial damage of aluminium alloy sheet was accumulated during the quasi-static tensile pre-straining phase. The pre-strained specimens were subsequently electromagnetically formed, and the damage increment of aluminium alloy sheet can be suppressed with the higher pre-straining level.
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Funding
This project (2019CFB196) was supported by Natural Science Foundation of Hubei Province, China. We also would like to express our appreciation for the financial support from State Key Laboratory of Materials Processing and Die & Mould Technology (P2018-013, Huazhong University of Science and Technology, China), and Jiangsu Key Laboratory of Precision and Micro-manufacturing Technology (Nanjing University of Aeronautics and Astronautics, China).
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Zeng, X., Meng, Z., Liu, W. et al. Deformation behaviour and damage evolution of aluminium alloy sheet in electromagnetic forming with uniform pressure actuator. Int J Adv Manuf Technol 109, 745–754 (2020). https://doi.org/10.1007/s00170-020-05704-0
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DOI: https://doi.org/10.1007/s00170-020-05704-0