Dynamic Analysis of Closed Die Electromagnetic Sheet Metal Forming to Predict Deformation and Failure of AA6061-T6 Alloy Using a Fully Coupled Finite Element Model
Zarak Khan,
Mushtaq Khan,
Se-Jin Yook,
Ashfaq Khan,
Muhammad Younas,
Muhammad Zeeshan Zahir,
Muhammad Asad
Affiliations
Zarak Khan
Department of Mechanical Engineering, HITEC University, Taxila 47080, Pakistan
Mushtaq Khan
Mechanical Engineering Department, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia
Se-Jin Yook
School of Mechanical Engineering, Hanyang University, Seoul 04763, Korea
Ashfaq Khan
School of Engineering, Robert Gordon University, Aberdeen AB10 7GJ, UK
Muhammad Younas
School of Engineering, Robert Gordon University, Aberdeen AB10 7GJ, UK
Muhammad Zeeshan Zahir
Department of Mechanical Engineering, University of Engineering and Technology, Peshawar 25000, Pakistan
Muhammad Asad
Mechanical Engineering Department, Prince Mohammad Bin Fahd University, Al-Khobar 31952, Saudi Arabia
This research presents a fully coupled 3D numerical model to analyse the dynamics of high-speed electromagnetic forming process for aluminium alloy AA6061-T6. The effect of Lorentz force distribution, velocity and kinetic energy on deformation, the bounce back effect and failure of the sheet has been investigated. Experiments were performed for AA6061-T6 alloy using an 18.750 KJ electromagnetic forming machine for varying the sheet thickness (0.5 mm, 1.02 mm and 1.63 mm) compared with the simulation results. The results showed that increasing the sheet thickness increases the Lorentz force due to a higher induced current. The inertial forces were more pronounced in thicker sheets (1.63 mm) as compared to the thinner sheets (0.5 mm and 1.02 mm), resulting in a higher bounce back effect for the thicker sheet. The numerical model accurately predicted the sheet failure for the 0.5-mm sheet, as also observed from the experimentation. The sheet deformation from simulations was found to be in good agreement with the experimental results.
