| 基于应变路径和分布效应的应力三轴度确定方法 |
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| 引用本文： | 贾东.基于应变路径和分布效应的应力三轴度确定方法[J].科学技术与工程,2013,13(10):2625-2629,2634. |
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| 作者姓名： | 贾东 |
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| 作者单位： | 中国工程物理研究院总体工程研究所 |
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| 基金项目： | 国家973项目(2010CB832702)、中国工程物理研究院基金(2009A0201008)以及中国工程物理研究院总体工程研究所创新与发展基金项目(12cxj25) |
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| 摘 要： | 对于延性损伤破坏材料,为了确定缺口试件在拉伸试验中的应力三轴度,建立应力三轴度相关的材料失效破坏函数关系,基于缺口试件在整个拉伸过程中的应变路径和应力三轴度在最小横截面上的分布效应,结合数值模拟,对现有的缺口试件应力三轴度确定方法进行了比较研究,给出了缺口试件更为合理的应力三轴度确定方法。
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| 关 键 词： | 缺口试件 应变路径 分布效应 应力三轴度 |
| 收稿时间： | 2012/11/13 0:00:00 |
| 修稿时间： | 12/4/2012 8:35:34 PM |
A method to determine stress triaxiality based on strain path and distribution effect |
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| jiadong.A method to determine stress triaxiality based on strain path and distribution effect[J].Science Technology and Engineering,2013,13(10):2625-2629,2634. |
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| Authors: | jiadong |
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| Institution: | (Institute of Systems Engineering,CAEP,Mianyang 621900,P.R.China) |
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| Abstract: | For notched specimens of ductile metals, the stress triaxiality varies greatly during tensile deformation. Considering strain path and distribution effect in the neck cross section, the existing formulas for the calculation of stress triaxiality should be improved for a more reasonable material fracture function. Based on the numerical simulations, several methods to determine the stress triaxiality of notched specimens were compared. A more reasonable method to determine the stress triaxiality of notched specimens was proposed in this paper. |
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