| 岩石微结构与微裂纹的损伤演化特征 |
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| 引用本文： | 王泽云,刘立,刘保县. 岩石微结构与微裂纹的损伤演化特征[J]. 岩石力学与工程学报, 2004, 23(10): 1599-1603 |
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| 作者姓名： | 王泽云 刘立 刘保县 |
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| 作者单位： | 西华大学建筑与土木工程学院岩土工程研究所,成都,610039 |
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| 基金项目： | 博士基金(0226962)资助项目 |
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| 摘 要： | 利用电子显微镜对岩石微结构及晶胞进行了研究。由微结构断裂所需耗散能分析计算了岩石微裂纹演化与分形特征。结合加载类型分析了岩石裂纹扩展的形式、方向，解释了岩石损伤演化的规律。研究表明：从微孔隙延伸成微裂纹，再扩展成宏观裂纹，其扩展速度、方向和产生数量主要取决于微结构中微元件的矿物组分、排列组合方式及组合密度，以及外载荷大小、方向及其比值、应力状态与加载速率等。
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| 关 键 词： | 岩石力学 微结构 晶胞 微裂纹 损伤演化 |
| 文章编号： | 1000-6915(2004)10-1599-05 |
| 收稿时间： | 2003-10-26 |
| 修稿时间： | 2004-01-12 |
CHARACTERISTICS OF DAMAGE EVOLUTION OF MICROPORE AND MICROCRACK IN ROCK |
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| Wang Zeyun,Liu Li,Liu Baoxian. CHARACTERISTICS OF DAMAGE EVOLUTION OF MICROPORE AND MICROCRACK IN ROCK[J]. Chinese Journal of Rock Mechanics and Engineering, 2004, 23(10): 1599-1603 |
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| Authors: | Wang Zeyun Liu Li Liu Baoxian |
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| Abstract: | Microstructure and cell of rock are researched by means of SEM. The propagation of rock microcrack is analyzed. The fractal characteristics are analyzed by dissipated energy consumed by microstructure fracture. The form and direction of crack propagation in rock are obtained according to given loading,by use of fractal geometry method and micro-thought method. The regularity of damage evolution of rock is explained. It is shown that the speed,direction and quantity of microcrack propagation depend mainly on the component,combination of mineral,combinatorial density,quantity and direction of load,state of stress,and ratio of stress components. |
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| Keywords: | rock mechanics microstructure cell microcrack damage evolution fractal characteristics |
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