| 粗粒料三维颗粒流数值模拟及其破坏准则研究 |
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| 引用本文： | 杨 贵,肖 杨,高德清.粗粒料三维颗粒流数值模拟及其破坏准则研究[J].岩土力学,2010,31(Z2):402-406. |
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| 作者姓名： | 杨 贵 肖 杨 高德清 |
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| 作者单位： | 1.河海大学 岩土力学与堤坝工程教育部重点试验室，南京 210098；2. 河海大学 安全与防灾工程研究所，南京 210098； 3. 河海大学 工程力学系，南京 210098 |
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| 基金项目： | 国家自然科学基金（No. 50639050）；国家博士后基金（No. 20090461063）；河海大学自然科学基金（No. 2009423911）。 |
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| 摘 要： | 采用三维颗粒流程序,进行了粗粒料的三维颗粒流数值模拟试验,试验过程中保持平均主应力和中主应力系数不变,研究了不同平均主应力和中主应力系数下粗粒料的变形和强度特性。通过比较粗粒料真三轴颗粒流模型试验结果和室内真三轴试验结果,发现三维颗粒流程序能够较好地模拟该种材料的三维力学特性。基于已提出的统一破坏准则理论,通过调整准则中的材料参数,发现该准则能够较好地描述粗粒料的室内真三轴试验和数值模拟试验结果。
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| 关 键 词： | 粗粒料 颗粒流 应力-应变 强度 破坏准则 |
| 收稿时间： | 2010-07-28 |
Study of three-dimensional particle flow numerical simulation and failure criterion for coarse-grained soils |
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| YANG Gui,XIAO Yang,GAO De-qing.Study of three-dimensional particle flow numerical simulation and failure criterion for coarse-grained soils[J].Rock and Soil Mechanics,2010,31(Z2):402-406. |
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| Authors: | YANG Gui XIAO Yang GAO De-qing |
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| Institution: | 1. Key Laboratory for Geomechanics and Embankment Engineering of Education Ministry, Hohai University, Nanjing 210098, China； 2. Engineering Safety and Disaster Prevention Institute, Hohai University, Nanjing 210098, China; 3. Department of Engineering Mechanics, Hohai University, Nanjing 210098, China |
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| Abstract: | Three-dimensional particle flow model test for coarse-grained soil is conducted with the mean principal stress and the intermediate principal stress parameter being invariant. The stress-strain and strength behaviors of coarse-grained soil are presented under the different mean principal stresses and the different intermediate principal stress parameters. Three-dimensional particle flow model test can well simulate three-dimensional mechanical behaviors based on comparisons between the particle flow model test results and laboratory test results. The unified failure criterion can well capture the particle flow model test results and laboratory test results by adjusting the material parameter. |
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| Keywords: | coarse-grained soil particle flow stress-strain strength failure criterion |
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