| 三轴压缩条件下钙质砂的颗粒破裂过程研究 |
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| 引用本文： | 孙吉主,汪稔.三轴压缩条件下钙质砂的颗粒破裂过程研究[J].岩土力学,2003,24(5):822-825. |
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| 作者姓名： | 孙吉主 汪稔 |
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| 作者单位： | 1. 武汉理工大学 土木建筑学院，湖北 武汉 430070；2. 中国科学院武汉岩土力学研究所，湖北 武汉 430071 |
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| 基金项目： | 国家九五攻关课题资助研究 (No. 97-926-03-02)。 |
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| 摘 要： | 提出了钙质砂在载荷作用下同时存在颗粒破碎和滑移两种变形机制，二者分别采用弹性损伤模型和边界面塑性模型予以描述，在模型中考虑颗粒损伤率对峰值应力比的影响。计算发现，围压和固结应力比增加使声发射活动增强，进而从微观机制上分析了原因。
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| 关 键 词： | 声发射 颗粒破碎 损伤 边界面 |
| 文章编号： | 1000-7598-(2003)05-0822-04 |
| 收稿时间： | 2002-06-27 |
| 修稿时间： | 2002年6月27日 |
Study on particle failure process of calcareous sand under triaxial compression |
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| SUN Ji-zhu ,WANG Ren.Study on particle failure process of calcareous sand under triaxial compression[J].Rock and Soil Mechanics,2003,24(5):822-825. |
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| Authors: | SUN Ji-zhu WANG Ren |
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| Institution: | 1. School of Civil Engineering and Architecture Wuhan University of Technology，Wuhan 430070，China； 2. Institute of Rock and Soil mechanics，Chinese Academy of Sciences，Wuhan 430071，China |
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| Abstract: | It is presented that the particle slides and itself is damaged simultaneously when loading,which are described by boundary surface plastic model and elastic damaged model respectively, the influence of particle failure on peak stress ratio is considered. Computation shows acoustic emission rises if the confining pressure and consolidation stress ratio increased, further it is discussed from micro-mechanism. |
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| Keywords: | acoustic emission particle failure damage boundary surface |
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