| 线弹簧模型法在含表面裂纹球壳中的应用 |
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| 引用本文： | 杨芳毓,王波.线弹簧模型法在含表面裂纹球壳中的应用[J].力学学报,1988(6). |
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| 作者姓名： | 杨芳毓 王波 |
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| 作者单位： | 大连工学院
(杨芳毓)，大连工学院(王波) |
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| 摘 要： | 本文应用线弹簧模型法,基于Sih.G.C.含二维裂纹球壳理论建立了含表面裂纹球壳的控制方程,采用数值方法选取位移试函数及合理地处理了对偶奇异积分方程使计算大为简化,通过电算实现了计算求解过程,从而获得了球壳表面裂纹前沿各点的应力强度因子之值。 最后将计算结果与考虑“膨胀效应”后的Ncwoun-Raju 解进行了比较,同时研究了曲率因素对表面裂纹线弹性断裂性态的影响。
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| 关 键 词： | 线弹簧模型法 表面裂纹 球壳 |
FRACTURE ANALYSES ON THE SPHERICAL SHELL WITH A SURFACE CRACK BY THE LINE-SPRING METHOD |
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| Yang Fangyu Wang Bo.FRACTURE ANALYSES ON THE SPHERICAL SHELL WITH A SURFACE CRACK BY THE LINE-SPRING METHOD[J].chinese journal of theoretical and applied mechanics,1988(6). |
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| Authors: | Yang Fangyu Wang Bo |
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| Institution: | Dalian Institute of Technology |
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| Abstract: | This paper presents linear elastic fracture analyses on the spherical shell with an internal (or external) surface crack by the line-spring method. The governing equations of the problems were derived in detail. The computation is greatly simplified by the proper treatment of the singular equations. The stress intensity factor at every point on the front of the surface crack was obtained by computation on the elastic fracture behavior of the surface crack was investigated. The results show the stress intensity factor of outside crack is always greater than that of inside crack if the stress change along the direction of the thickness is disregarded. |
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| Keywords: | Line-spring Method Surface crack Spherical shell |
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