| 等参数畸变元在计算带裂纹结构应力强度因子中的应用和精度 |
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| 引用本文： | 周瑞忠,刘光廷.等参数畸变元在计算带裂纹结构应力强度因子中的应用和精度[J].福州大学学报(自然科学版),1989(4):65-72. |
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| 作者姓名： | 周瑞忠 刘光廷 |
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| 作者单位： | 福州大学土建系
(周瑞忠)，福州大学土建系(刘光廷) |
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| 摘 要： | 本文讨论等参数畸变元的奇异性及其在计算有裂纹结构的应力强度因子的适应性．介绍用Ｆｏｕｒｉｅｒ变换方法和Ｗｅｂｅｒ－Ｓｃｈａｆｈｅｉｔｌｉｎ间断积分，求得裂纹尖端位移场精确解的封闭形式．用精确解和有限元结果相比较，对等参数畸变元在工程应用中的精度以实际算例给出了数值说明。
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| 关 键 词： | 等参畸变元 强度因子 位移场 |
The Application and Its Accuracy of Singular Quadratic Isoparametric Element |
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| Zhou Ruizhong,Liu Guanting.The Application and Its Accuracy of Singular Quadratic Isoparametric Element[J].Journal of Fuzhou University(Natural Science Edition),1989(4):65-72. |
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| Authors: | Zhou Ruizhong Liu Guanting |
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| Institution: | Department of Civil and Architectural Engineering |
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| Abstract: | The present paper deals with the ealculation of the stress intensity factor of cracked structure and the singularity of the quadratic isoparametric element. After employing Fouroer translation and Wcber-Schafhcitlin integra- tion, we obtain the closed form of displacement expression near the tips of the crack. The. comparison between theoretical solution and numerical result shows them to be in good agreement With each other. |
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| Keywords: | quadratic isoparametric elcment stress intensity factor the field of displactement |
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