Advances in Fracture Mechanics Studies on Fracture Resistance and Research Methods of Asphalt Concrete

被引：0
作者：
Song W. [1 ]
Wu H. [1 ]
机构：
[1] School of Civil Engineering, Central South University, Changsha
来源：
Cailiao Daobao/Materials Reports | 2023年 / 37卷 / 16期
基金：
中国国家自然科学基金;
关键词：
asphalt concrete; elastic⁃plastic; fatigue; fracture mechanics; linear⁃elastic; mesoscopic simulation; test method;
D O I：
10.11896/cldb.22050119
中图分类号：
学科分类号：
摘要：
Based on the application background of fracture mechanics in asphalt concrete and the shortcomings of current research, the relevant achievements and research results are summarized from the basic theory of asphalt concrete fracture mechanics, the research progress of fracture performance and the fracture test method of asphalt concrete. The application conditions and evaluation parameters of linear elastic fracture mechanics, elastic⁃plastic fracture mechanics and fatigue fracture mechanics in asphalt concrete are expounded. The research status of asphalt concrete fracture resistance is summarized from the aspects of composition, recycling and warm mix technology, interlayer bonding and mesoscopic simulation. The current test methods for evaluating the fracture performance of asphalt concrete are highlighted. Insufficiency of current research and suggestions for future research are pointed out. The research results show that the low⁃temperature and medium⁃temperature fractures of asphalt concrete are generally evaluated and analyzed by linear elastic fracture mechanics and elastoplastic fracture mechanics, respectively, and the evaluation indexes of fracture performance at medium and low temperature are different. A unified evaluation index for a wide temperature range is recommended to be proposed. Currently, lots of studies are conducted on fracture performance under monotonic load, few studies on fracture behavior of asphalt concrete under cyclic load are performed. It is necessary to clarify the crack propagation law of asphalt concrete through fatigue test. The mesoscopic simulation of asphalt concrete fracture can reveal the mechanism of crack occurrence and propagation from a mesoscopic perspective, but the selection of the failure model and the determination of mesoscopic parameters are important factors that affect the accuracy of the simulation results, which need further attention. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
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