6[4]Wang N M. Large plastic deformation of a circular sheet caused by punch stretching. Trans of ASME, J of Applied Mechanics, 1970, 37
7[5]Wifi A S. An incremental complete solution of the stretch-forming and deep-drawing of a circular blank using a hemispheical punch. Intenationa J of Mechanical Science, 1976, 18(1)
8[6]Wang Chuantao. Advanced stamping simulation technology: state of business and induatrial prospects for the next century. In: Proceedinge of NUMISHEET'99. France, 1999
9Wang N M. Large plastic deformation of a circular sheet caused by punch stretching. Trans of ASME, J of Applied Mechanics, 1970, 37
10Wifi A S. An incremental complete solution of the stretch-forming and deep-drawing of a circular blank using a hemispheical punch. Intenationa J of Mechanical Science, 1976, 18(Ⅰ)
