| 基于离散元方法的沥青混合料虚拟断裂试验(英文) |
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| 引用本文： | 陈俊,黄晓明.基于离散元方法的沥青混合料虚拟断裂试验(英文)[J].东南大学学报,2009,25(4):518-522. |
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| 作者姓名： | 陈俊 黄晓明 |
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| 作者单位： | 东南大学交通学院,南京,210096 |
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| 基金项目： | The National High Technology Research and Development Program of China(863 Program)，the Research and Innovation Foundation for Graduate Students in Jiangsu Province，the Excellent Doctoral Dissertation Foundation of Southeast University |
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| 摘 要： | 为了深入研究沥青混合料开裂特性, 设计了基于沥青混合料二维数字试件的断裂虚拟试验. 在考虑混合料二维截面的集料数量级配和集料不规则形状的基础上, 通过生成程序建立了沥青混合料的二维虚拟试件; 运用离散元方法, 建立了混合料二维离散元模型, 并进行了虚拟的中点弯曲小梁断裂试验; 为了验证虚拟试验方法的正确性, 在实验室内进行了沥青混合料小梁的中点弯曲断裂试验. 室内实体试验与虚拟试验结果的比较发现, 虚拟断裂试验获得的混合料断裂强度与室内试验结果一致, 表明虚拟断裂试验可以作为混合料断裂性能分析的辅助手段.
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| 关 键 词： | 沥青混合料 断裂 离散元方法 虚拟试验 |
Virtual fracture test of asphalt mixture based on discrete element method |
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| Chen Jun Huang Xiaoming.Virtual fracture test of asphalt mixture based on discrete element method[J].Journal of Southeast University(English Edition),2009,25(4):518-522. |
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| Authors: | Chen Jun Huang Xiaoming |
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| Institution: | Chen Jun Huang Xiaoming(School of Transportation,Southeast University,Nanjing 210096,China) |
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| Abstract: | In order to study fracture behaviors of asphalt mixtures,virtual tests of the two-dimensional(2D)microstructure based on the discrete element method(DEM)are designed. The virtual structure of the 2D digital specimen of asphalt mixture is generated based on a particle generation program,in which the gradation and the irregular shapes of aggregates are considered. With the 2D digital specimens,a DEM-based mixture model is established and center-point beam fracture simulation tests are conducted by the DEM. Me... |
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| Keywords: | asphalt mixture fracture discrete element method virtual test |
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