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首页> 外文期刊>Engineering Fracture Mechanics >Stress intensity factors for corner cracks emanating from fastener holes under tension
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Stress intensity factors for corner cracks emanating from fastener holes under tension

机译：张力下紧固件孔产生的角部裂纹的应力强度因子

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摘要

In this paper, previous work associated with the stress intensity factor for corner cracks at fastener holes in finite thickness plates is briefly reviewed. The stress intensity factors for two symmetric quarter-elliptical corner cracks subjectedto remote tension are evaluated by using both the quarter-point displacement and J-integral methods based on three-dimensional finite element analyses. The geometry ratios analyzed cover a wide range, i.e. depth ratio a/t: 0.2-0.95, aspect ratio a/c:0.2-5, and hole radius ratio r/t: 0.5-3. Analysis of the J-integral path independence and mutual comparison of the stress intensity factor results between the two methods demonstrate that the present results are of good numerical accuracy. Deviation ofthe present results from some other solutions found in the literature is also revealed, particularly from Newman and Raju's equations. It is shown that the difference among these results obtained by the different methods is generally within a reasonablebound of error, but Newman and Raju's equations systematically underestimate (up to 15%) the stress intensity factor for cracks of depth ratio larger than 0.8.
机译：在本文中，简要回顾了与有限厚度板中紧固件孔角部裂纹的应力强度因子相关的先前工作。利用四分之一点位移法和基于三维有限元分析的J积分方法，对两个对称的四分之一椭圆形拐角裂纹的应力强度因子进行了评估。所分析的几何比覆盖很宽的范围，即深度比a / t：0.2-0.95，长宽比a / c：0.2-5，以及孔半径比r / t：0.5-3。两种方法之间的J积​​分路径独立性分析和应力强度因子结果的相互比较表明，目前的结果具有良好的数值精度。还揭示了当前结果与文献中发现的其他一些解决方案的偏差，特别是与纽曼和拉朱方程式的偏差。结果表明，通过不同方法获得的这些结果之间的差异通常在合理的误差范围内，但是Newman和Raju方程系统地低估了深度比大于0.8的裂纹的应力强度因子（最多15％）。

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