| 复合型裂纹应力强度因子的有限元计算 |
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| 引用本文： | 翁剑成,谢煌生.复合型裂纹应力强度因子的有限元计算[J].龙岩学院学报,2011,29(2):44-47. |
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| 作者姓名： | 翁剑成 谢煌生 |
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| 作者单位： | 龙岩学院物理与机电工程学院,福建龙岩,364012 |
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| 摘 要： | 介绍一种计算三维复合型裂纹应力强度因子的外推法,由于裂纹尖端的奇异性,该法采用退化的1/4节点奇异单元,通过近裂尖的几个节点进行应力强度因子的求解,然后根据这些应力强度因子拟合成直线,求得裂纹尖端的应力强度因子。
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| 关 键 词： | 三维复合型裂纹 三通管道 应力强度因子 |
The Finite Element Calculation of Stress Intensity Factors in Mixed Mode Crack |
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| WENG Jian-cheng,XIE Huang-sheng.The Finite Element Calculation of Stress Intensity Factors in Mixed Mode Crack[J].Journal of Longyan Univercity,2011,29(2):44-47. |
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| Authors: | WENG Jian-cheng XIE Huang-sheng |
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| Institution: | WENG Jian-cheng,XIE Huang-sheng |
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| Abstract: | Owing to the stress singularities on the crack tip,an extrapolation method to calculate stress intensity factor of three-dimensional mixed-mode crack was introduced,which adopted the degradation of the 1/4 node singular element to calculate the stress intensity factor of some nodes about the crack tip.A straight line based on these stress intensity factors was fitted and the stress intensity factor on the crack tip was then obtained. |
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| Keywords: | three-dimensional mixed-mode crack three-way pipe stress intensity factors |
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