In order to investigate the damage to microstructure and some other micromechanical responses during a fatigue test on asphalt mixture, Particle Flow Code (PFC) was used to reconstruct a two-dimensional discrete element model of asphalt mixture, based on computed tomography (CT) images and image-processing techniques. The indirect tensile fatigue test of asphalt mixture was simulated with this image-based microstructural model, and verified in the laboratory. It was found that there were four stages during the fatigue failure: no crack, crack initiation, crack developing, and interconnected crack. Cracks mainly developed between the aggregate and asphalt mortar, near the loading axis. The corresponding stages of failure, the developing trend and the distribution characteristics of the cracks matched well with those in the laboratory test. Furthermore, the trends of both the time-load curve and time-displacement curve from the simulation test were also consistent with those from the experimental test. In short, the distribution characteristics of cracks and internal forces of asphalt mixture show that it is feasible to simulate the fatigue performance of the asphalt mixture by a discrete element method (DEM).

Xuelian Li

Xinchao Lv

Xueying Liu

Junhong Ye

Applied Sciences

Applied Sciences (ISSN 2076-3417) provides an advanced forum on all aspects of applied natural sciences. It publishes reviews, research papers and communications. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced. Electronic files and software regarding the full details of the calculation or experimental procedure, if unable to be published in a normal way, can be deposited as supplementary electronic material.

The journal "Applied Sciences (Switzerland)" (ISSN 2076-3417) provides an advanced forum for all aspects of applied natural sciences. It publishes reviews, research papers, and communications, aiming to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There are no restrictions on the length of the papers, and full experimental details must be provided to ensure reproducibility. If the complete details of calculations or experimental procedures cannot be published in the usual manner, electronic files and software can be deposited as supplementary electronic material.

《Applied Sciences (Switzerland)》期刊（ISSN 2076-3417）为应用自然科学的各个方面提供了一个先进的论坛。期刊发表综述、研究论文和通讯，旨在鼓励科学家尽可能详细地发布他们的实验和理论结果。对论文的长度没有限制，必须提供完整的实验细节，以便他人能够重复实验。如果无法以正常方式发布的计算或实验程序的完整细节，电子文件和软件可以作为补充电子材料存放。

Category	Quartile
综合性期刊	4
综合性期刊, 化学综合	3
综合性期刊, 工程综合	4
综合性期刊, 材料科学综合	4
综合性期刊, 物理应用	4

Discrete Element Analysis of Indirect Tensile Fatigue Test of Asphalt Mixture

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Journal Info

Category	Quartile
PHYSICS, APPLIED	2