| I型裂纹虚拟裂纹闭合法的误差分析及修正 |
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| 引用本文： | 彭国良,闫辉,杜太焦,张相华.I型裂纹虚拟裂纹闭合法的误差分析及修正[J].固体力学学报,2016,37(3):280-283. |
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| 作者姓名： | 彭国良 闫辉 杜太焦 张相华 |
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| 作者单位： | 西北核技术研究所 |
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| 基金项目： | 激光与物质相互作用国家重点实验室基金 |
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| 摘 要： | 对虚拟裂纹闭合法的误差来源进行了分析。依据Griffith的椭圆裂纹近似理论，针对虚拟裂纹闭合法的位移相等假设，提出了一种修正方法。用有限元程序计算了二维I型裂纹的扩展问题，并与理论近似解做了比较。计算结果表明，修正以后可以得到更好的精度,在裂纹长度较短时，修正效果更好。
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| 收稿时间： | 2015-07-22 |
The analysis of error and modification of the virtual crack closure technique for crack of mode I |
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| Abstract: | The origin of the error of the virtual crack closure technique (VCCT) has been analyzed. According to Griffith’s theory of ellipse crack, a modified method has been given out for the assumption of equal displacement of VCCT. The problem of two dimension mode I crack spread has been simulated by the finite element method. And the result has been compared with theory result. The result indicated that the modified method can get the better precision especially when the crack is short. |
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