| 中低围压花岗岩细观破坏机制的数值模拟 |
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| 引用本文： | 于庆磊,杨天鸿,刘洪磊,唐春安. 中低围压花岗岩细观破坏机制的数值模拟[J]. 东北大学学报(自然科学版), 2009, 30(7) |
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| 作者姓名： | 于庆磊 杨天鸿 刘洪磊 唐春安 |
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| 作者单位： | 1. 东北大学,资源与土木工程学院,辽宁,沈阳,110004
2. 大连理工大学,土木水利学院,辽宁,大连,116024 |
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| 基金项目： | 国家重点基础研究发展规划(973计划)，国家自然科学基金，教育部重点科技项目，教育部高等学校博士学科点专项科研基金 |
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| 摘 要： | 采用数字图像处理技术表征花岗岩的细观结构,利用基于数字图像的岩石破裂过程分析系统(RFPA-DIP)建立反映花岗岩内部矿物颗粒分布的数值模型,进行花岗岩压缩数值试验,分析花岗岩压缩荷载作用下破坏机理.研究结果表明,花岗岩非均匀的细观结构起着使试件内部产生了拉应力区的作用;单轴压缩荷载作用下,试件在细观层次上以拉伸破坏为主;中低围压条件下,试件表现为张拉破坏和剪切破坏相互耦合的破坏方式,而且破坏机制随围压的增大是不断变化的,剪切破坏逐渐成为主控破坏方式.
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| 关 键 词： | 数字图像 非均匀性 张拉破坏 剪切破坏 拉应力区 |
Numerical Simulation on Granite Failure Mechanism at Meso-Level Under Moderate or Low Confining Pressure |
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| YU Qing-lei,YANG Tian-hong,LIU Hong-lei,TANG Chun-an. Numerical Simulation on Granite Failure Mechanism at Meso-Level Under Moderate or Low Confining Pressure[J]. Journal of Northeastern University(Natural Science), 2009, 30(7) |
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| Authors: | YU Qing-lei YANG Tian-hong LIU Hong-lei TANG Chun-an |
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| Affiliation: | YU Qing-lei1,YANG Tian-hong1,LIU Hong-lei1,TANG Chun-an2(1.School of Resources & Civil Engineering,Northeastern University,Shenyang 110004,China,2.School of Civil & Hydraulic Engineering,Dalian University of Technology,Dalian 116024,China.) |
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| Abstract: | Digital image processing technologies were applied to characterizing the heterogeneity of granite so as to incorporate it into rock failure process analysis code based on digital image processing,i.e.,RFPA-DIP,and a numerical model of granite was thus developed.The compression tests were carried out numerically to investigate granite failure mechanism at meso-level.The results show that the heterogeneity of rock results in the appearance of tensile stress zones.Under the condition of uniaxial compressive st... |
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| Keywords: | digital image heterogeneity tensile failure shear failure tensile stress zone |
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