| 冲压板材拉伸筋阻力的一种有效数值计算方法 |
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| 引用本文： | 李大永,胡平,王锦程.冲压板材拉伸筋阻力的一种有效数值计算方法[J].应用力学学报,2001,18(1):58-64. |
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| 作者姓名： | 李大永 胡平 王锦程 |
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| 作者单位： | 上海交通大学模具技术研究所 |
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| 基金项目： | 国家自然科学基金(19472031)和国家“九五”重点科技攻关项目(96-120-13)基金联合资助项目 |
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| 摘 要： | 将弹塑性有限变形的拟流动角点本构理论和厚向各向异性屈服函数引入弹塑性动力显式有限元列式，对板材通过拉伸筋的变形过程及拉伸筋阻力进行了数值模拟，并与有关实验结果进行了比较很好的一致性，表明了该计算方法的有效性。进而，数值研究了拉伸筋形状、界面摩擦状况以及材料的厚向各向异性对拉伸筋阻力的影响，为实际覆盖件冲压成形中拉伸筋的设置提供了重要的定量依据。
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| 关 键 词： | 拉伸筋阻力 动力显式 有限元方法 冲压 板材 数值计算 |
| 文章编号： | 1000-4939(2001)01-0058-07 |
| 修稿时间： | 1999年9月5日 |
An Effective Numerical Method for Drawbead Force of
Stamping Sheet Metals |
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| Li Dayong,Hu Ping,Wang jincheng.An Effective Numerical Method for Drawbead Force of
Stamping Sheet Metals[J].Chinese Journal of Applied Mechanics,2001,18(1):58-64. |
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| Authors: | Li Dayong Hu Ping Wang jincheng |
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| Abstract: | A quasi-flow corner constitutive theory and a normal anisotropic yield function are introduced into dynamic relaxation explicit finite element formula. The deformation process of sheet metal passing through drawbead and the drawbead restraining force are numerically simulated. The simulated results are compared with experimental ones. Good agreement is shown and the validity of the present method is proved. Furthermore, the influence of drawbead shape, interface friction and normal anisotropy on drawbead restraining force is numerically studied in order to provide quantity reference for the lay-out of drawbead in practical panel stamping forming. |
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| Keywords: | drawbead restraining force dynamic explicit finite element method quasi-flow corner theory normal anisotropy |
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