A mesoscopic numerical method for fracture energy of concrete

被引：3
作者：
Zeng, Ming-Hui [1 ]
Wu, Zhi-Min [1 ]
Zheng, Jian-Jun [2 ,4 ]
Yu, Rena C. [3 ]
机构：
[1] Dalian Univ Technol, State Key Lab Coastal & Offshore Engn, Dalian, Peoples R China
[2] Zhejiang Univ Technol, Sch Civil Engn, Hangzhou, Peoples R China
[3] Univ Castilla La Mancha, ETS Ingn Caminos Canales & Puertos, Ciudad Real, Spain
[4] Zhejiang Univ Technol, Sch Civil Engn, Hangzhou 310023, Peoples R China
来源：
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES | 2023年 / 46卷 / 07期
基金：
中国国家自然科学基金;
关键词：
actual fracture energy; aggregate size; concrete; crack propagation path; mesoscopic numerical method; nominal fracture energy; STRESS INTENSITY FACTORS; INTERFACE CRACK; STRENGTH; BEHAVIOR; KINKING;
D O I：
10.1111/ffe.14001
中图分类号：
TH [机械、仪表工业];
学科分类号：
0802 ;
摘要：
This paper develops a mesoscopic numerical method for evaluating the fracture energy of concrete. In this method, concrete is modeled as a three-phase composite material, composed of mortar, coarse aggregate, and the interface between them. The actual mixed-mode I-II crack growth path in mode I fracture tests is traced by applying crack propagation criteria. After verifying the numerical method by a series of three-point bending tests, the effects of aggregate location, aggregate size, and crack propagation path on the fracture energy of concrete are evaluated. It is found that for the fracture mode of crack bypassing aggregates, the actual fracture energy of concrete is significantly affected by the aggregate location but independent of the aggregate size and the crack propagation path.
引用
收藏
页码：2380 / 2395
页数：16
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