冷绕成形螺旋弹簧回弹理论及数值模拟

,Kim D ,Wagoner R H ,et al.Semi-analytic hybrid meth - od to predict springback in the 2D draw bend test[J].Journal of Applied Mechanics-Transactions of the ASME , 2007 , 74 ( 6): 1264 - 1275 . [ 15 ]Firat M.U-channel forming analysis with an emphasis on spring - back deformation[J].Materials & Design , 2007 , 28 ( 1): 147 - 154 . [ 16 ]Burchitz I A ,Meinders T.Adaptive through-thickness integra tion for accurate springback prediction[J].International Journal for Nu - merical Methods in Engineering , 2008 , 75 ( 5): 533 - 554 . [ 17 ]曹金凤,石亦平.ABAQUS 有限元分析常见问题解答[M]. 北京: 机械工业出版社, 2009 : 221 - 233 . 图 11 不同绕簧节距情况下, 簧丝某同一横截面最外层相同的一个单元在成形过程中的应力随时间变化图 3 000 2 500 2 000 1 500 1 000 500 0 4 7 11 14 18 t /s Mises Stress/MPa P = 5 mm P = 10 mm P = 15 mm ( a ) 弹簧绕制成形时( b ) 弹簧回弹后图 12 弹簧回弹前后位移变化示意图 232