3Zeng Y S, Li Z Q, Experimental research on the tube push-bending process [ J ]. Journal of Materials Processing Technology, 2002,122:237-240.
4Baudin S, Ray P, MacDonald B J,et al. Development of a novel method of tube bending using finite element simulation [ J ]. Journal of Materials Processing Technology, 2004,153 : 128-133.
5Zhang Y, Redekop D. Shell element simulation of the push method of tube bending[J]. Journal of Achievements in Materials and Manufacturing Engineering, 2006,17 ( 1-2 ) :301-304.
6Xiao X T, Liao Y J, Sun Y S. Study on varying curvature pushbending technique of rectangular section tube [ J ]. Journal of Materials Processing Technology, 2007, 187-188:476-479.