Abstract
Aluminum is expected to gain popularity as material for the bodies of the next generation of lighter and more fuel-efficient vehicles. However, its lower formability compared with that of steel tends to create considerable problems. A controllable restraining force caused by adjusting the penetration of drawbeads can improve the formability of aluminum. The paper describes a spatial and temporal FE model for the analysis of this technique, especially in non-symmetric panel forming. Comparison of the results of numerical simulations with the corresponding experimental results shows that the predictions of strain distribution on the panel are in excellent agreement. Furthermore, FLD analysis indicates that the active drawbead concept is beneficial to the formability of Al 6111-T4.
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