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| 压缩载荷下准脆性材料宏细观损伤变量研究 | |
| 引用本文： | 姜小春,谢和平,周宏伟.压缩载荷下准脆性材料宏细观损伤变量研究[J].岩土力学,2008,29(9):2531-2536. |
| 作者姓名： | 姜小春 谢和平 周宏伟 |
| 作者单位： | 1. 中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083;中交水运规划设计院有限公司,北京,100007;中国矿业大学,力建学院岩石力学与分形研究所,北京,100083 2. 中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083;中国矿业大学,力建学院岩石力学与分形研究所,北京,100083;四川大学,水利水电学院,成都,610065 3. 中国矿业大学,煤炭资源与安全开采国家重点实验室,北京,100083;中国矿业大学,力建学院岩石力学与分形研究所,北京,100083 |
| 基金项目： | 国家重点基础研究发展计划(973计划)，国家自然科学基金 |
| 摘 要： | 在连续损伤力学的基本框架内构建损伤力学模型，而对损伤变量的定义及其演化方程的描述则充分借鉴细观损伤力学的研究成果，就可以建立一个宏细观相结合的损伤模型。对于压缩载荷下准脆性材料损伤，通过假设宏观损伤分析和细观损伤分析所得到的有效弹性张量等价，可以求得宏观损伤变量与细观损伤机制相关的表达及其损伤演化方程，进而可以建立宏细观相结合的损伤模型，并以单轴压缩为例表明这种分析方法是可行的。 |
| 关 键 词： | 损伤力学 宏观损伤变量 细观损伤变量 有效模量 |
| 收稿时间： | 2006-11-20 |
Analysis of relationship between macroscopic damage variable and mesoscopic damage variable of quasi-brittle materials under compression |
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| JIANG Xiao-chun,XIE He-ping,ZHOU Hong-wei.Analysis of relationship between macroscopic damage variable and mesoscopic damage variable of quasi-brittle materials under compression[J].Rock and Soil Mechanics,2008,29(9):2531-2536. | |
| Authors: | JIANG Xiao-chun XIE He-ping ZHOU Hong-wei |
| Institution: | 1. State Key Laboratory of Coal Resources and Mine Safety, China University of Mining and Technology, Beijing 100083, China; 2. China Communications Planning and Design Institute for Water Transportation, Beijing 100007, China; 3. Institute of Rock Mechanics and Fractals, China University of Mining and Technology, Beijing 100083, China; 4. College of Water Resources and Hydropower, Sichuan University, Chengdu 610065,China |
| Abstract: | Based on the framework of continuum damage theory, a damage model combining continuum damage mechanics with mesoscopic damage mechanics is built through defining the damage variable and describing the damage evolvement using the result of mesoscopic damage theory. For the damage of quasi-brittle materials under compression, continuous damage variable and its evolvement equation correlating with the mesoscopic damage mechanism are obtained; it is based on the hypothesis that the effective moduli from the macroscopic and mesoscopic damage analysis are equivalent. Then, the damage model combining continuum damage theory with mesoscopic damage theory can be developed. The analytical method has been proved to be feasible by the uniaxial compression experiment. |
| Keywords: | damage mechanics macroscopic damage variable mesoscopic damage variable effective moduli |
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