Advanced sheet metal forming


Meinders, T. and Boogaard, A.H. van den and Huetink, J. (2003) Advanced sheet metal forming. In: Sixth ESAFORM Conference on Material Forming, April 28-30, 2003, Salerno, Italy.

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Abstract:Weight reduction of vehicles can be achieved by using high strength steels or aluminum. The formability of aluminum can be improved by applying the forming process at elevated temperatures. A thermo-mechanically coupled material model and shell element is developed to accurately simulate the forming process at elevated temperatures. The use of high strength steels enlarges the risk of wrinkling. Wrinkling indicators are developed which are used to drive a local mesh refinement procedure to be able to properly capture wrinkling. Besides, to intensify the use of implicit finite element codes for solving large-scale problems, a method is developed which decreases the computational time of implicit codes by factors. The method is based on introducing inertia effects into the implicit finite element code. It is concluded that the computation time is decreased by a factor 5-10 for large-scale problems.
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Engineering Technology (CTW)
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