| 基于X—rayCT的沥青混合料三维重构方法 |
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| 引用本文： | 汪海年,黄志涵,李磊,李晓燕,尤占平.基于X—rayCT的沥青混合料三维重构方法[J].中国科技论文在线,2013(11):1115-1118,1144. |
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| 作者姓名： | 汪海年 黄志涵 李磊 李晓燕 尤占平 |
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| 作者单位： | [1]长安大学道路结构与材料交通行业重点实验室,西安710064 [2]西北工业大学力学与土木建筑学院,西安710068 [3]密歇根理工大学土木工程与环境学院,美国霍顿49931 |
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| 基金项目： | 国家自然科学基金资助项目（51178056）;中央高校基本科研业务费专项资金（CHD2012ZD013） |
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| 摘 要： | 沥青混合料内部的细微观结构对沥青混合料的路用性能有很大的影响，很有必要开发一种可以进行沥青混合料内部结构受力状况分析的三维重构模型。基于X-rayCT技术，每隔1rrlrn获取沥青混合料试件断层图像，共64张。将控制集料、砂浆、空隙三者之间的阈值进行物质的区分。利用Matlab自编程序完成沥青混合料的三维重构，并提出了一种获取沥青砂浆黏弹性参数的方法。用该模型进行数值模拟后的试验结果与室内试验结果有很好的吻合，验证了本重构方法的正确性。
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| 关 键 词： | 道路工程 有限元 三维模型 Abaqus 数值模拟 |
Three-dimensional microstructural model of asphalt mixtures based on X-ray CT images |
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| Wang Hainian,Huang Zhihan,Li Lei,Li Xiaoyan,＇,You Zhanping.Three-dimensional microstructural model of asphalt mixtures based on X-ray CT images[J].Sciencepaper Online,2013(11):1115-1118,1144. |
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| Authors: | Wang Hainian Huang Zhihan Li Lei Li Xiaoyan ＇ You Zhanping |
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| Institution: | 1 ( 1. Road Structure and Materials Key Laboratory for Transportation, Chang＇ an University, Xi an 710064, China ; 2. School of Mechanical and Civil and Architecture, Northwestern Polytechnic University, Xi ＇ an 710068,China, 3. Department of Civil and Environmental Engineering, Michigan Technological University, Houghton, MI 49931 ,USA) |
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| Abstract: | Microstructures of asphalt concrete have significant influence on its pavement performance. It is necessary to develop a three-dimensional microstructural model of asphalt mixtures to analyze the inner microstructure of asphalt mixture under loading. This paper acquired 64 images of asphalt mixture every 1 mm based on the X-ray CT technology. Aggregates, mastics and voids were divided by the threshold values. A 3D model was reconstructed by self-developed procedure of Matlab. Prony series was used to describe the viscoelastic properties of asphalt mastic. The result of numerical simulation is roughly consistent with the la- boratory test, showing the accuracy of this three-dimensional microstructural model, and it can well reflect the internal structure. |
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| Keywords: | highway engineering finite element three-dimensional model Abaqus numerical simulation |
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