Micromechanical characteristics of the asphalt mixture in bending condition
Micromechanical characteristics of the asphalt mixture in bending condition
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弯曲状态下沥青混合料的微观力学特性
DOI：
10.1007/s11431-012-5085-1
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发表时间：
2013-02
影响因子：
4.6
通讯作者：
Ni WenChen
中科院分区：
文献类型：
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作者：
Cui YaNan;Xing YongMing;Ni WenChen
沥青混合料的特性与混合料未受损时的关键特性有关。采用CCD摄像机采集沥青混合料弯曲梁试件的二维微观结构图像。对图像进行去噪、边界识别、二值化和矢量化等处理后，导入有限元软件，建立了微机械有限元模型。模拟结果表明，由于混合材料的非均匀性，位移等值线谱不是一条光滑的曲线。最大应变值出现在两粗骨料之间的试件底部，是断裂开始的位置。集料的应力值大于沥青基质的应力值。与沥青基体应变不同，集料应变接近于零，这是因为集料具有较强的抵抗自身变形的能力。集料与沥青基体之间的变形差异最终会导致界面开裂。通过沥青混合料梁的三点弯曲试验，可以改善上述结果。
The characteristics of asphalt mixtures are associated with the key features of the mixed material when it is not damaged. Two-dimensional (2D) microstructure images of asphalt mixture bending beam specimen were captured by a CCD camera. After image processing, such as noise elimination, boundary identification, image binarization and vectorization, the images were imported into finite element (FE) software in order to set up the micromechanical finite element (FE) model. The simulation results show that the displacement contours spectrum is not a smooth curve since the mixed material is heterogeneous. Also, the largest strain value exists at the bottom of the specimen between two coarse aggregates, and it is the point where the fracture starts. The stress values of aggregates are larger than those of the asphalt matrix. Different from the strain of asphalt matrix, the strain of aggregates is close to zero because the aggregates have higher capability to resist self-deformation. The difference in deformation between aggregate and asphalt matrix can lead to an interface crack as a final result. All these results can be improved by three-point bending test of asphalt mixture beam.
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影响因子：
--
作者：
Shengfeng Yang;Xinhua Yang;Chuan-yao Chen
通讯作者：
Shengfeng Yang;Xinhua Yang;Chuan-yao Chen
影响因子：
1.7
作者：
E. Masad;J. Button
通讯作者：
E. Masad;J. Button
DOI：
10.1061/(asce)0899-1561(2004)16:2(140
发表时间：
2004-03-01
影响因子：
3.2
作者：
You, Z;Buttlar, WG
通讯作者：
Buttlar, WG
DOI：
10.1061/(asce)0899-1561(2004)16:2(107
发表时间：
2004-03-01
影响因子：
3.2
作者：
Sadd, MH;Dai, QL;Shukla, A
通讯作者：
Shukla, A
影响因子：
3.9
作者：
M. Sadd;Qingli Dai
通讯作者：
M. Sadd;Qingli Dai