| 板材成形局部塑性失稳与起趋的数值模拟 |
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| 引用本文： | 柳玉起,胡平,郭威,李运兴. 板材成形局部塑性失稳与起趋的数值模拟[J]. 机械工程学报, 1997, 0(2) |
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| 作者姓名： | 柳玉起 胡平 郭威 李运兴 |
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| 作者单位： | 吉林工业大学工程力学系 |
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| 基金项目： | 国家自然科学基金、国家教委优秀青年教师基金与浙江大学CAD＆CG国家重点实验室联合资助 |
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| 摘 要： | 以Ｈｉｌｌ关于弹塑性材料唯一性的充分性条件为理论基础，采用虚功率增率型原理和Ｍｉｎｄｌｉｎ曲壳单元的弹塑性大变形有限元模型成功地模拟了方盒与圆筒拉深成形凸缘起皱现象，以及圆锥件拉深成形侧壁起皱现象。方盒拉深成形凸缘起皱的个数、形状和位置等起皱模式与试验结果完全吻合，并且实现了起皱过程的３维激光动态仿真演示
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| 关 键 词： | 曲壳单元，弹塑性，有限元法，拉深，起皱，仿真 |
^NUMERICAL SIMULATION FOR LOCAL PLASTIC INSTABILITY AND WRINKLING OF SHEET METAL FORMING |
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| Liu Yuqi Hu Ping Guo Wei Li Yunxing. ^NUMERICAL SIMULATION FOR LOCAL PLASTIC INSTABILITY AND WRINKLING OF SHEET METAL FORMING[J]. Chinese Journal of Mechanical Engineering, 1997, 0(2) |
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| Authors: | Liu Yuqi Hu Ping Guo Wei Li Yunxing |
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| Affiliation: | Jilin University of Technology |
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| Abstract: | A Mindlin shell element model ofelastic-plastic large deformation based on a virtuaJ power principle is prolosed . On the theoretical basis of Hill' s .called bifurcated sufficiency condition on elastic plastic materials, the flange wrinkling .with respect to the deep-drawing with square punch and cylinder punch, and the side-wall wrin- kling with respect to the deep-drawing with circular cone punch are successfully simulated . The flange wrinkling malels, for example, the number, shape and location of the wrinkling are very coincided with experimental ones. Finally, using 3Dlaser life-object modeling technique and imitating movement technique, the occurring and developing of the wrinkling processes are displayed . |
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| Keywords: | Shell element Elastic plastic Finite element method Deep-drawing Wrinking Simulation |
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