| 内部压力作用下无限大板中椭圆孔及裂纹问题 |
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| 引用本文： | 刘宝良,闫龙海,闫相桥.内部压力作用下无限大板中椭圆孔及裂纹问题[J].辽宁工程技术大学学报(自然科学版),2012,31(4):540-543. |
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| 作者姓名： | 刘宝良 闫龙海 闫相桥 |
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| 作者单位： | 1. 黑龙江科技学院理学院,黑龙江哈尔滨,150027
2. 哈尔滨工业大学复合材料与结构研究所,黑龙江哈尔滨,150001 |
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| 基金项目： | 国家自然科学基金资助项目(10272037);黑龙江省普通高校学校学术骨干资助项目(1252G053);黑龙江省青年学术骨干项目资助项目;黑龙江科技学院青年才俊资助项目 |
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| 摘 要： | 为研究在工程实际中经常遇到的无限大板含有椭圆孔及裂纹问题,采用改进的带裂尖单元位移不连续法,重点研究在内部压力作用下裂纹扩展规律.通过改变椭圆孔的几何参数,揭示出孔的几何参数对断裂参数应力强度因子(SIF)的影响.结果表明:椭圆孔对裂纹的应力强度因子(SIF)具有一定的屏蔽作用,这种屏蔽作用随着椭圆孔的几何参数而变化,该研究在工程上具有重要意义.
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| 关 键 词： | 椭圆孔 裂纹 应力强度因子 裂尖单元 杂交位移不连续 边界元 屏蔽作用 内部压力 |
An elliptical hole-crack problem in infinite plate under internal pressure |
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| LIU Baoliang
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YAN Longhai
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YAN Xiangqiao.An elliptical hole-crack problem in infinite plate under internal pressure[J].Journal of Liaoning Technical University (Natural Science Edition),2012,31(4):540-543. |
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| Authors: | LIU Baoliang YAN Longhai YAN Xiangqiao |
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| Institution: | 1.Department of Mathematics and Mechanics,Heilongjiang Institute of Science and Technology, Harbin 150027,China;2.Research Laboratory on Composite Materials,Harbin Institute of Technology,Harbin 150001,China) |
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| Abstract: | In order to deal with cracks emanating from an elliptical hole in infinite plate under internal pressure,this study investigates the characteristics of crack development using an improved hybrid displacement discontinuity method with crack-tip element.By changing elliptical hole geometry parameters,the effect of the hole geometry parameters on the SIFs is revealed.The results show that an elliptical hole has a shielding effect on the SIF of cracks emanating from the hole.The shielding effect is varied with the hole geometry parameters.The finding is of significance in engineering applications. |
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| Keywords: | elliptical hole crack stress intensity factor crack-tip element hybrid displacement discontinuity boundary element shielding effect internal pressure |
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