2MAKINOUCHI A.NAKAMACHI E,ONATA Eet al.2nd international conference on numerical sim ulafion of 3D sheet metal forming processes [C]. Isehara Japan, 1993.
3LEE J K,KINZEL G L ,WAGONER R H.Proeeedings of the 3nd international conference on numerical simulation of 3D sheet metal forming processes verification of sim ulations with exits (NumiSheet' 96) [C].Dearbom Michigan, 1996.
4S.W. Lee, D.Y. Yang. An assessment of numerical parameters influencing spring-back in explicit finite element analysis of sheet metal forming process[J].Journal of Materials Processing Technology, 1998,80～81:60～67.
5MARC_UG Manual[M]. Los Angeles, California USA, Marc, Inc., 2002.
6Y.M. Huang, D.K. Leu. Finite element analysis of contract problems for sheet metal bending process[J]. Int. J. Numer. Math. Eng, 1997,59:339～342.
8INAMDAR M, DATEL P P. Development of an artificial neural network to predict springback in air vee bending[ J]. lnt J Adv Manul Technol, 2000 ( 3 ) :376 - 381.
