| 修正的拉应力裂纹扩展准则及裂隙\=水压对裂纹扩展的影响 |
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| 引用本文： | 张敦福,李术才.修正的拉应力裂纹扩展准则及裂隙\=水压对裂纹扩展的影响[J].计算力学学报,2009,26(1):114-119. |
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| 作者姓名： | 张敦福 李术才 |
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| 作者单位： | 1. 山东大学,土建与水利学院工程力学系,济南,250061
2. 山东大学,土建与水利学院工程力学系,济南,250061;山东大学,岩土与结构工程研究中心,济南,250061 |
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| 摘 要： | 对脆性材料的第一主应力--拉应力裂纹扩展准则进行了补充和修正,修正的裂纹扩展准则能确定裂纹扩展步长.以平面斜置裂纹扩展为例,利用无网格Galerkin方法,对不含裂隙水压的二维裂纹扩展进行数值模拟,计算结果与试验结果一致,表明最大周向拉应力准则的正确性.在不同裂隙水压条件下,研究了二维裂纹初始破裂,并在给定水压下对二维裂纹扩展路径进行了数值模拟跟踪.结果表明裂隙水压对裂纹初始破裂方向、破裂步长、破裂载荷和裂隙岩体破裂强度有显著影响.有水压和无水压的扩展迹线不同,但后续的扩展趋势相同.
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| 关 键 词： | 最大周向拉应力准则 裂隙水压 裂纹扩展 无网格Galerkin方法 |
| 收稿时间： | 3/1/2007 12:00:00 AM |
The modified tensile stress crack propagation criterion and influence of cranny hydraulic pressure on crack propagation |
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| ZHANG Dun-fu and LI Shu-chai.The modified tensile stress crack propagation criterion and influence of cranny hydraulic pressure on crack propagation[J].Chinese Journal of Computational Mechanics,2009,26(1):114-119. |
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| Authors: | ZHANG Dun-fu and LI Shu-chai |
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| Institution: | 1.Department of Engineering Mechanics;School of Civil Engineering;Shandong University;Jinan 250061;China;2.Geotechnical & Structural Engineering Research Center;China |
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| Abstract: | The first principal stress tensile stress criterion for brittle material was supplied and modified.The modified crack propagation criterion can give out crack propagation steps.The 2-D sidelong crack propagation was taken as an example.The element free Galerkin method was used.Numerical simulation of 2-D crack propagation without cranny hydraulic pressure was accomplished.The simulation results agree well with experiential results.The correctness of the maximal circumferential tension stress criterion is pr... |
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| Keywords: | maximal circumferential tensile stress criterion cranny hydraulic pressure crack propagation element free galerkin method |
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