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基于无旋转自由度壳单元的回弹预测方法

Simulation of springback using rotation-free shell element
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摘要 针对板料成形模拟与回弹模拟周期较长,需要准备的数据量大,难以应用于早期产品设计阶段的不足,提出了一种快速回弹预测方法.该方法基于有限元逆算法快速评估冲压件的成形性,采用无旋转自由度壳单元计算板料回弹,这种壳单元每个节点只有3个位移自由度,计算量少,并修正了该单元在空间情况下的转角变换系数,有效地提高了板料回弹的模拟速度.以Numisheet′05考题中的汽车底盘横梁为例,将计算结果与实验结果进行对比,验证了算法的可行性与精确性. A fast springback analysis method with less input data preparation is proposed,in which the formability of the stamping part is predicted based on the inverse approach firstly,and springback is calculated by rotation-free shell element only with three degrees of free per node.The rotation angle coefficient in the element formulation was updated.The springback analysis method can be used in the preliminary design stage with high calculation efficiency.The cross member of Numisheet′05 is presented to demonstrate the efficiency of the springback analysis method with the experimental result.
作者 章志兵 柳玉起 杜亭
机构地区 华中科技大学材料成形与模具技术国家重点实验室
出处 《华中科技大学学报（自然科学版）》 EI CAS CSCD 北大核心 2009年第10期85-88,共4页 Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金 国家自然科学基金资助项目(50905067) 国家科技支撑计划资助项目(2006BAF01A43) 中国博士后科学基金资助项目(20080440930)
关键词 板料成形 逆算法 回弹 有限元 无旋转自由度壳单元 sheet metal forming inverse approach： springback finite element method rotation-free shell
分类号 TG386 [金属学及工艺—金属压力加工] TP391.9 [自动化与计算机技术—计算机应用技术]
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参考文献9

  • 1Wu J, Zhou D J. Specifications for BM2: underbody cross member panel [J]. AIP Conference Proceedings, 2005 (778): 1 150-1 156.
  • 2Guo Y Q, Batoz J L, Naceur H, et al. Recent developments on the analysis and optimun design of sheet metal forming parts using a simplified inverse approach[J]. Computers and Structures, 2000, 78: 133-148.
  • 3Lan J, Dong X H, Li Z G. Inverse finite element approach and its application in sheet metal forming[J]. Journal of Materials Processing Technology, 2005, 170(3): 624-631.
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  • 6Guo Y Q, Gati W, Naceur H, et al. An efficient DKT rotation free shell element for springback simulation in sheet metal forming [J]. Computers and Structures, 2002, 80:2 299-2 312.
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二级参考文献14

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共引文献5

华中科技大学学报（自然科学版）
2009年 第10期

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