| 超塑性材料约束胀形中的空洞损伤与变形局部化 |
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| 引用本文： | 胡平,李运兴,陈塑寰.超塑性材料约束胀形中的空洞损伤与变形局部化[J].力学学报,1995,27(2):226-231. |
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| 作者姓名： | 胡平 李运兴 陈塑寰 |
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| 作者单位： | 吉林大学 汽车动态模拟国家重点实验室 |
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| 基金项目： | 国家自然科学基金，中国科学院力学研究所LNM开放实验室资助 |
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| 摘 要： | 将含有二阶段空洞长大模型的本构关系引入大变形刚黏塑性有限元中，研究了空洞敏感材料向锥台形凹模内超塑约束胀形时空洞化损伤与变形局部化行为，详细阐述静水背压Ｐｈ、初始空洞长大速率β＿０以及模具几何形状（锥角θ，模腔高度Ｈｐ）对局部化以及空洞断裂行为的影响，给出实现完全贴模条件下Ｐｈ－θ，Ｐｈ－β＿０，Ｈｐ－θ以及Ｐｈ－Ｈｐ间临界关系。
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| 关 键 词： | 超塑性材料 约束胀形 空洞 损伤 变形 |
CAVITY DAMAGE AND DEFOBMATION LOCALIZATION BEHAVIORS OF THE CONSTRAINED BULGIN OF SUPERPLASTIC METAL SHEETS |
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| Hu Ping,Li Yunxing ,Chen Suhuan.CAVITY DAMAGE AND DEFOBMATION LOCALIZATION BEHAVIORS OF THE CONSTRAINED BULGIN OF SUPERPLASTIC METAL SHEETS[J].chinese journal of theoretical and applied mechanics,1995,27(2):226-231. |
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| Authors: | Hu Ping Li Yunxing Chen Suhuan |
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| Abstract: | In this paper, the cavity damage and deformation localization behaviors of the constrained bulging of the cavity-sensitive superplastic metal sheets into cone-desk shape dies are numerically studied by using a largestrain rigid visco-plastic finite element method. Based on the simulation of practical alloy sheets,the influences of the superimposed pressure Ph,the initial cavity growth rate β_0 and the geomletrical shapes of the dies(the cone angle θ and the die heightHp)on the localization and cavity fract... |
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| Keywords: | superplastic metal sheet constrained bulging caVity fracture deformation localizdtion rigid visco-plastic FEM |
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