Abstract
In sheet metal forming, the optimal blank shape has many advantages, i.e. reduction of the material cost, minimizing the forming defects, improvement of the quality of formed part, etc. However, finding the optimal blank shapes could be difficult and time consuming. In this paper, an efficient blank design methodology is proposed based on geometrical resemblance, which requires several iterations of finite element analysis simulation to obtain an optimal blank shape. In order to verify this methodology, two case studies on deep drawing processes and one experimental validation have been carried out. The methodology has been shown to be computationally efficient, requiring as few as four finite element iterations to obtain an optimal blank shape.
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