Damage Evolution and Crack Propagation in Semicircular Bending Asphalt Mixture Specimens

作     者：Guowei Zeng Xinhua Yang Long Chen Fan Bai 

作者机构：School of Civil Engineering and MechanicsHuazhong University of Science and Technology School of ScienceWuhan University of Science and Technology 

出 版 物：《Acta Mechanica Solida Sinica》 (固体力学学报（英文版）)

年 卷 期：2016年第29卷第6期

页      面：596-609页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0701[理学-数学] 0823[工学-交通运输工程] 

基　　金：supported by the National Natural Science Foundation of China(Nos.10872073 and 11602178) the Hubei Provincial Natural Science Foundation of China(No.2015CFB205) 

主　　题：semicircular bending heterogeneous model damage notch orientation 

摘      要：The damage and fracture behaviors of semicircular bending （SCB） asphalt mixture specimens with different orientation notches are experimentally and numerically investigated. In the numerical simulations, asphalt mixture is modeled as a two-phase material, namely a mix of coarse aggregates and asphalt mastic, and the mechanical behavior of asphalt mastic is charac- terized with the damage constitutive model and the damage-based fracture criterion. Some SCB experiments are performed on the asphalt mixture specimens with different orientation notches to validate the numerical method. Finally, the effects of notch orientation and aggregate distrib- ution on crack path, damage distribution, and the load vs. displacement relation are numerically evaluated.