| 块体表面裂纹应力强度因子有限元方法研究 |
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| 引用本文： | 肖涛,左正兴,廖日东.块体表面裂纹应力强度因子有限元方法研究[J].北京理工大学学报,2009,29(1):9-13. |
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| 作者姓名： | 肖涛 左正兴 廖日东 |
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| 作者单位： | 北京理工大学,机械与车辆工程学院,北京,100081;北京理工大学,机械与车辆工程学院,北京,100081;北京理工大学,机械与车辆工程学院,北京,100081 |
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| 摘 要： | 研究三维表面裂纹建模及其计算精度问题. 采用有限元方法,对奇异单元和J积分两种求解裂纹强度因子方法的计算精度进行研究,并进一步研究了计算精度对网格密度和网格形式的依赖程度. 研究发现,对奇异单元法而言,影响计算结果准确度的主要原因是裂纹尖端区的尺寸,网格密度的影响不大;对J积分法而言,网格形式和网格密度的影响都不大,适合处理复杂结构的应力强度因子计算.
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| 关 键 词： | 应力强度因子 1/4奇异单元法 J积分法 有限元法 |
| 收稿时间： | 2008/3/27 0:00:00 |
Finite Element Analysis Method for the Stress Intensity Factor of Surface Cracks |
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| XIAO Tao,ZUO Zheng-xing and LIAO Ri-dong.Finite Element Analysis Method for the Stress Intensity Factor of Surface Cracks[J].Journal of Beijing Institute of Technology(Natural Science Edition),2009,29(1):9-13. |
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| Authors: | XIAO Tao ZUO Zheng-xing and LIAO Ri-dong |
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| Institution: | School of Mechanical and Vehicular Engineering;Beijing Institute of Technology;Beijing 100081;China |
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| Abstract: | Investigates the modeling methods for three dimensional surface crack problems.Based on finite element method,1/4-point displacement method and J-integral method are used to calculate the stress intensity factors along the entire crack front.Several meshing cases are studied.It is shown that,when using 1/4-point displacement method,the stress intensity factor results are sensitive to the crack front region size and non-sensitive to the mesh size.For J-integral method,the results are non-sensitive to both th... |
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| Keywords: | stress intensity factor (SIF) 1/4-point displacement method J-integral method finite element method |
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