| 圆管外表面轴向椭圆裂纹应力强度因子的有限元研究 |
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| 引用本文： | 何家胜,李书容,危卫.圆管外表面轴向椭圆裂纹应力强度因子的有限元研究[J].管道技术与设备,2008(2):18-20. |
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| 作者姓名： | 何家胜 李书容 危卫 |
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| 作者单位： | 1. 武汉工程大学机械工程学院,湖北武汉,430074;武汉市压力容器压力管道安全工程研究中心,湖北武汉,430074
2. 武汉工程大学机械工程学院,湖北武汉,430074 |
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| 摘 要： | 采用1/4节点奇异单元,建立了求解圆筒外表面轴向椭圆裂纹应力强度因子的断裂力学分析模型,分析了应力强度因子随圆筒外径与内径比k=ro/ri、椭圆率a/b及裂纹的相对深度a/t的变化规律,并结合VB编制出了求解圆筒外表面椭圆裂纹应力强度因子的自动分析软件。
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| 关 键 词： | 圆管 1/4节点奇异单元 轴向半椭圆裂纹 有限元 VB |
| 文章编号： | 1004-9614(2008)02-0018-03 |
| 修稿时间： | 2007年10月22 |
Finite Element Analysis of the Stress Intensity Factor of Axial Semi-elliptical Outside Surface Cracks in Circular Tube |
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| HE Jia-sheng,LI Shu-rong,WEI Wei.Finite Element Analysis of the Stress Intensity Factor of Axial Semi-elliptical Outside Surface Cracks in Circular Tube[J].Pipeline Technique and Equipment,2008(2):18-20. |
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| Authors: | HE Jia-sheng LI Shu-rong WEI Wei |
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| Abstract: | A analytic model of fracture mechanics has been establishment to calculate the stress intensity factor of axial semi-elliptical outside surface cracks in a circular tube by using the methods of 1/4-displacement of the finite element;the varying regularity of SIF is studied as the ratio of the external diameter divide to the internal diameter k,ellipticity a/b and the law of change of the relative depth a/t.And an automatic analysis program to calculate the stress intensity factor of the semi-elliptical surface crack is worked out,in combination with VB. |
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| Keywords: | circular tube 1/4-displacement of finite element axial semi-elliptical finite element VB |
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