Simulation of Heat Assisted Forming of Commercial Aluminium Alloy AA5182

Rajarajan Govindarajan; Martin Zubeil; Kathleen Siefert; Christophe Ageorges; Karl Roll

doi:10.4028/www.scientific.net/KEM.473.675

Paper Titles

Experimental and Numerical Investigation of the Effect of Anisotropy on Springback in U-Bending Process
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Numerical Prediction of Damage Evolution in Sheet Metal Forming Processes with Nonlinear and Complex Strain Paths
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FEM Analysis of Sandwich Shells with Metallic Foam Cores
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A Simulation Approach for Chaining the Forming-Welding-Crash Behaviour of Sheet Metal Structures
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Simulation of Heat Assisted Forming of Commercial Aluminium Alloy AA5182
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Blank Optimization in Elliptical-Shape Sheet Metal Forming Using Response Surface Model Coupled with Reduced Basis Technique and Finite Element Analysis
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Influence of the Adaptive Remeshing during Simulations of Sheet Metal Forming Processes
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FE-Simulation of the Heat Transfer by Defined Cooling Conditions during the Hot Stamping Process
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Consideration of Elastic Tool Deformation in Numerical Simulation of Hydroforming with Granular Material Used as a Medium
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 473Simulation of Heat Assisted Forming of Commercial...

Simulation of Heat Assisted Forming of Commercial Aluminium Alloy AA5182

Abstract:

To improve the formability of commercial aluminium alloy AA5182, a new heat assisted forming method is used. The process sequence of this method is; cold forming (pre-forming, 90 to 95% of final shape), heat treatment and cooling it down to room temperature and final cold forming. AA5182 is a non-heat treatable alloy and hence heat treating a strain hardened non-heat treatable aluminium alloy leads to lose in strength and gain in plastic recovery. Therefore by heat treating a preformed part and then following it up by further forming stages, it not only gains the lost strength back but also shows increased formability. This behavior is particularly useful in forming more complex automotive interior body parts. To accurately simulate this method, modeling the effect of heat treatment is important. Initial investigations on tensile tests showed that the degree of pre-forming in combination with heat treatment is directly proportional to plastic recovery. Which means, the more the pre-strain is the more the recovery becomes viable. Based on this, a new algorithm has been developed and implemented in LS-DYNA to capture the effect of heat treatment. Finally experimental investigations were carried out on a cross die deep drawn cup to validate the developed simulation model.