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模拟裂纹传播的新方法——无网格伽辽金法
引用本文:李卧东,王元汉,陈晓波.模拟裂纹传播的新方法——无网格伽辽金法[J].岩土力学,2001,22(1):33-36.
作者姓名:李卧东  王元汉  陈晓波
作者单位:1. 华中科技大学土木建筑工程学院,
2. 第二炮兵指挥学院,
摘    要:无网格伽辽金法采用移动最小二乘法构造位移函数,由于它脱离了单元的概念,因此特别适合岩体介质裂纹的传播分析,计算了拉伸荷载作用下裂纹尖端的应力集中,对J积分围线作了进一步的讨论;运用无网格伽辽金法模拟岩体介质中的不连续面,计算了压剪复合型裂纹的应力强度因子,运用不同的断裂准则对裂纹的传播进行了分析模型,数值结果表明该方法与实验结果符合得很好。

关 键 词:无网格伽辽金法  移动最小二乘法  压剪复合型裂纹  裂纹传播  岩体  应力强度
文章编号:1000-7598-(2001)01-0033-04
修稿时间:2000年3月10日

A new method of modeling crack propagation with Element-Free Galerkin Method
LI Wodong,Wang Yuanhan,Chen Xiaobo.A new method of modeling crack propagation with Element-Free Galerkin Method[J].Rock and Soil Mechanics,2001,22(1):33-36.
Authors:LI Wodong  Wang Yuanhan  Chen Xiaobo
Abstract: The approximate function is constructed with moving least squares method in Element-Free Galerkin Method(EFGM). EFGM is especially sutitable for analysis of crack propagation in rock structures because no element connectivity is needed. Stress singularity at crack tip is calculated under tensile loads and J integral contour is discussed in the paper. Displacement discontinuity in rock structures is modeled with EFGM and stress intensity factors of compressive-shear mixed mode crack tip are computered Crack propagation is analysed and simulated according to different fracture criteria. Numerical examples show that the agreement numerical simulation and test data is satisfactory.
Keywords:
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