金属薄膜单轴拉伸过程中的等效性能研究
Effective properties of metal films during uniaxial stretching
查看参考文献20篇
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文摘
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关注单轴拉伸条件下裂纹萌生扩展阶段的金属薄膜性能变化.通过运用Parallel、Maxwell和Hashin-Shtrikman等效理论,建立拉伸过程中金属薄膜的裂纹模型,得出了电阻值与应变的关系,并与现有实验结果进行了比较.结果表明, Maxwell等效理论条件下的理论值与实验结果吻合较好.然后运用有限元计算,比较了拉伸能量法和均匀化方法在计算等效弹性模量时的准确性,最后建立了等效电阻和等效弹性模量以及损伤变量的关联. |
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其他语种文摘
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This paper focuses on the variation in properties of the metal films under the conditions of uniaxialstretching. By employing the effective theories (i. e. Parallel, Maxwell, and Hashin-Shtrikman theories), cracks models are established to obtain the relation between effective electric-resistance and strain. Thetheoretical solutions are compared with the previous experimental results. It is shown that the Maxwell solutionagrees well with the experimental results. Furthermore, the tensile strain energy method and the homogenousmethod could be used to estimate the effective Young's modulus of films during the deformation, and theaccuracies of the estimation are subsequently compared using the finite elements method. The results show thatthe homogenous method is better. Finally, the correlations of the effective electric-resistance with effectiveYoung's modulus and damage variable are established. |
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来源
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中国科学院研究生院学报
,2010,27(3):314-322 【核心库】
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关键词
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柔性电子
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金属薄膜
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裂纹扩展
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等效理论
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地址
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1.
中国科学院力学研究所, 非线性力学国家重点实验室;;强度与振动教育部重点实验室, 北京, 100190
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西安交通大学, 强度与振动教育部重点实验室, 西安, 710049
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语种
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中文 |
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ISSN
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1002-1175 |
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学科
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力学;金属学与金属工艺 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:3905407
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