| 基于塑性流动本构关系的多步反向模拟法 |
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| 引用本文： | 唐炳涛,鹿晓阳.基于塑性流动本构关系的多步反向模拟法[J].机械工程学报,2011,47(4):47-52. |
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| 作者姓名： | 唐炳涛 鹿晓阳 |
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| 作者单位： | 山东建筑大学力学研究所,济南,250101;山东大学材料科学与工程学院,济南,250061 |
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| 基金项目： | 国家自然科学基金(51005137); 中国博士后科学基金(20100471541); 山东省自然科学基金(ZR2010EQ025)资助项目 |
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| 摘 要： | 传统板料成形反向模拟法的本构关系是建立在塑性形变理论的基础上,无法考虑变形历史的影响.提出一种新型有效的多步反向模拟法,采用弹塑性材料模型提高计算精度:引入DKT12薄壳单元考虑类似模具圆角处的弯曲一反弯曲效应等应变历史的影响.提出一种基于塑性流动理论的本构方程,可以快速准确地处理弹/塑性变形及加载/卸载状况,提高了应...
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| 关 键 词： | 板料成形 反向模拟法 多步成形 本构关系 |
Novel Multi-step Inverse Finite Element Method Based on Constitutive Equations of Plastic Flow in Sheet Metal Forming |
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| TANG Bingtao,LU Xiaoyang.Novel Multi-step Inverse Finite Element Method Based on Constitutive Equations of Plastic Flow in Sheet Metal Forming[J].Chinese Journal of Mechanical Engineering,2011,47(4):47-52. |
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| Authors: | TANG Bingtao LU Xiaoyang |
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| Affiliation: | TANG Bingtao1,2 LU Xiaoyang1,2(1.Institute of Engineering Mechanics,Shandong Jianzhu University,Jinan 250101,2.School of Material Science and Engineering,Shandong University,Jinan 250061) |
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| Abstract: | Because of the shortcoming of plastic deformation theory of the traditional inverse finite element method of sheet metal forming:No consideration of the effect of deformation history,a novel multi-step inverse finite element method based on the principle of virtue work is proposed.Elasto-plastic material model is adopted to improve calculation accuracy.DKT12 shell element is introduced to consider the effect of deformation history such as bending-unbending around die entrance.In order to improve the stress ... |
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| Keywords: | Sheet metal forming Inverse finite element method Multi-step forming Constitutive equations |
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