| 椭圆孔三维应力集中及其对疲劳强度的影响 |
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| 引用本文： | 佘崇民,郭万林,孟波,张斌.椭圆孔三维应力集中及其对疲劳强度的影响[J].计算力学学报,2007,24(2):215-218. |
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| 作者姓名： | 佘崇民 郭万林 孟波 张斌 |
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| 作者单位： | 1. 北京石油化工学院,机械工程学院,过装系,北京,102617
2. 南京航空航天大学,纳米科学研究所,江苏,南京,210016 |
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| 基金项目： | 国家自然科学基金(50275073)，中国博士后科学基金(20060390282)，航空科学基金(03B52011)资助项目 |
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| 摘 要： | 应用有限单元法对有限厚中心椭圆孔板的三维应力集中进行了分析。发现厚板的最大应力集中总是与自由表面保持一固定的距离而不随板厚的增加而变化;椭圆形状因子越小,距离自由表面越近。得到了最大三维应力集中、表面应力集中与相应平面解之间的近似关系和经验公式;研究了厚度对疲劳强度的影响,并给出相应的影响系数。
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| 关 键 词： | 应力集中 椭圆孔 三维 疲劳强度 |
| 文章编号： | 1007-4708(2007)02-0215-04 |
| 修稿时间： | 2005年3月18日 |
Three-dimensional stress concentration and its influence on the fatigue strength at an elliptic hole |
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| SHE Chong-min,GUO Wan-lin,MENG Bo,ZHANG Bin.Three-dimensional stress concentration and its influence on the fatigue strength at an elliptic hole[J].Chinese Journal of Computational Mechanics,2007,24(2):215-218. |
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| Authors: | SHE Chong-min GUO Wan-lin MENG Bo ZHANG Bin |
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| Abstract: | The through-thickness variations of stress concentration factor(SCF) along the wall of elliptic holes in finite thickness plates have been analyzed using the finite element(FE) method.For a thick plate,the distance between the location of the maximum SCF and the free surface is invariable and independent of its thickness;it is smaller for lower elliptical shape factor.The relationships of the maximum SCF,surface SCF and the corresponding planar solution were found,and the corresponding empirical formulae were obtained by fitting the FE results.The influence of thickness on the fatigue strength was studied and a factor to describe this influence was also proposed. |
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| Keywords: | stress concentration elliptic hole three-dimensional fatigue strength |
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