| 含夹杂粉末冶金材料拉伸试件的损伤分析 |
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| 引用本文： | 王万鹏,岳珠峰,杨治国.含夹杂粉末冶金材料拉伸试件的损伤分析[J].中国有色金属学报,2004,14(6):949-955. |
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| 作者姓名： | 王万鹏 岳珠峰 杨治国 |
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| 作者单位： | 1. 西北工业大学,工程力学系,西安,710072
2. 中航第2集团608研究所,株洲,412002 |
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| 基金项目： | 国家自然科学基金，航空基金，教育部留学回国人员科研启动基金，长江学者奖励基金 |
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| 摘 要： | 采用Gurson本构方程对含有夹杂的粉末冶金材料拉伸试件进行有限变形塑性损伤分析.研究了不同位置和不同形状的夹杂对基体空穴长大、形核、应力分布、裂纹萌生及材料的破坏特性的影响.数值模拟结果表明:夹杂位置和夹杂形状对空穴体积增长分数和空穴成核率有着显著影响,夹杂形状和位置对基体破坏作用明显,可以推论对粉末冶金材料件的使用寿命有明显的影响.
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| 关 键 词： | Gurson本构方程 数值模拟 夹杂 形核 |
| 文章编号： | 1004-0609(2004)06-0949-07 |
| 修稿时间： | 2003年9月15日 |
Damage analysis of tensile specimens of powder metallurgy material including voids |
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| WANG Wan-peng,YUE Zhu-feng,YANG Zhi-guo.Damage analysis of tensile specimens of powder metallurgy material including voids[J].The Chinese Journal of Nonferrous Metals,2004,14(6):949-955. |
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| Authors: | WANG Wan-peng YUE Zhu-feng YANG Zhi-guo |
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| Affiliation: | WANG Wan-peng~1,YUE Zhu-feng~1,YANG Zhi-guo~2 |
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| Abstract: | Based on Gursion model, the damage analysis was carried out on the tensile specimens of powder metallurgy materials including isolated big void. Special attentions were put on the influence of the location and the shape of isolated big void. The void mechanism was studied. The results shows that the isolated void has much influence on the damage and fracture of the powder metallurgy materials. |
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| Keywords: | Gurson model numerical simulation inclusion nucleation |
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