4Naceur H,GUO Y Q, Batoz J L, et al. Optimization of drawbead restraining forces and drawbead design in sheet metal forming process[J].International Journal of Mechanical Science, 2001.43(10) :2407-2434.
5Hambli R, Guerin F. Application of a neural network for optimum clearance prediction in sheet metal blan- king processes[J]. Finite Elements in Analysis and De sign,2003.39(2) - 1039-1052.
6Sosnowski W, Marczewska I, Marczewski A. Sensitivity based optimization of sheet metal forming tools[J]. Journal of Materials Science and Technology, 2002. 124 (3) : 319-328.
