| 动载荷作用下延性材料的孔洞增长和成核 |
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| 引用本文： | 张凤国,崔亚平,秦承森,李勇. 动载荷作用下延性材料的孔洞增长和成核[J]. 兵工学报, 2004, 25(6): 730-733 |
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| 作者姓名： | 张凤国 崔亚平 秦承森 李勇 |
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| 作者单位： | 北京应用物理与计算数学研究所,北京,100088;吉林建筑工程学院土木工程系 |
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| 摘 要： | 对材料中微孔洞增长和成核的研究是从细观上分析金属层裂现象的重要手段.与以往分析只考虑塑性变形不同的是本文采用JC经验本构模型,分析了在动载荷作用下孔洞变形(弹性变形、弹塑性变形以及塑性变形)情况下的孔洞增长,给出了其数值计算的方程,同时分析了缓慢加载时外载荷与孔洞增长之间的关系,以及材料失效时外载荷与孔洞初始几何尺寸之间的关系,最后分析了材料中的成核现象.
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| 关 键 词： | 固体力学 损伤 孔洞增长 成核 动载荷 |
NUCLEATION AND GROWTH OF VOIDS IN DUCTILE MATERIALS UNDER HIGH PRESSURE DYNAMIC LOADING |
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| Zhang Fengguo Cui Yaping Qin Chengsen Li Yong. NUCLEATION AND GROWTH OF VOIDS IN DUCTILE MATERIALS UNDER HIGH PRESSURE DYNAMIC LOADING[J]. Acta Armamentarii, 2004, 25(6): 730-733 |
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| Authors: | Zhang Fengguo Cui Yaping Qin Chengsen Li Yong |
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| Affiliation: | Zhang Fengguo Cui Yaping * Qin Chengsen Li Yong |
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| Abstract: | Nucleation and growth of voids in ductile materials subject to high pressure dynamic loading are important topics in the analysis of metallic damage in the mesoscale level. In this paper, the growth and nucleation of voids in elastic and plastic regions were analyzed by means of JC empirical equation. An equation of void growth was given and a formula of threshold stress for void nucleation under slow loading was derived. The computation threshold value is in agreement with experimental result. |
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| Keywords: | solid mechanics damage growth of void nucleation dynamic loading |
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