| Weight Function Method for Stress Intensity Factor of Internal Surface Semi-elliptical Crack in Elliptical Holes |
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| 作者姓名： | XIE Wei HUANG Qi-qing |
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| 作者单位： | School of Aeronautics, Northwestern Polytechnical University, Xi＇an 710072, P. R. China |
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| 摘 要： | The hatches for inspecting are usually designed with elliptical holes in airplane structures, so computation of the stress intensity factor of three dimensional crack at elliptical holes is pivotal for damage tolerance analysis of these structures. In this paper, weight function is derived for a two dimensional through cracks at elliptical holes by applying a compounding method. Stress intensity factor formulas for an internal surface semi-elliptical crack in elliptical holes are obtained wing the three dimensional weight function method. Stress intensity factors for an internal surface semi-elliptical crack in elliptical holes under remote tension are computed. At the same time, research on how radius of curvature for elliptical holes affect stress intensity factors was conducted. Stress intensity factors decrease when radius of curvature increases. Some results and conclusions which are of practical value are given.
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| 关 键 词： | 压力强度因子 椭圆型 机械应力 重力功能 |
| 修稿时间： | 2006-11-01 |
Weight Function Method for Stress Intensity Factor of Internal Surface Semi-elliptical Crack in Elliptical Holes |
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| XIE Wei,HUANG Qi-qing.Weight Function Method for Stress Intensity Factor of Internal Surface Semi-elliptical Crack in Elliptical Holes[J].International Journal of Plant Engineering and Management,2007,12(2):93-100. |
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| Authors: | XIE Wei HUANG Qi-qing |
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| Affiliation: | [1]School of Aeronautics, Northwestern Polytechnical University, Xi＇an 710072, P. R. China |
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| Abstract: | The hatches for inspecting are usually designed with elliptical holes in airplane structures, so computation of the stress intensity factor of three dimensional crack at elliptical holes is pivotal for damage tolerance analysis of these structures. In this paper, weight function is derived for a two dimensional through cracks at elliptical holes by applying a compounding method. Stress intensity factor formulas for an internal surface semi-elliptical crack in elliptical holes are obtained using the three dimensional weight function method. Stress intensity factors for an internal surface semi-elliptical crack in elliptical holes under remote tension are computed. At the same time, research on how radius of curvature for elliptical holes affect stress intensity factors was conducted. Stress intensity factors decrease when radius of curvature increases. Some results and conclusions which are of practical value are given. |
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| Keywords: | compounding method internal surface semi-elliptical crack stress intensity factor weight function elliptical holes |
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