In-situ investigation of quasi-static fracture processes and micro-deformation fields in artificial rock

被引：0
作者：
Zuo, Jianping [1 ,2 ]
Li, Ying [1 ]
机构：
[1] China Univ Min & Technol Beijing, Sch Mech & Civil Engn, Beijing 100083, Peoples R China
[2] China Univ Min & Technol Beijing, Int Innovat Ctr Min & Rock Mech, Beijing 100083, Peoples R China
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2025年 / 459卷
基金：
中国国家自然科学基金;
关键词：
Artificial rock; Different loading rates; Velocity oscillation; Digital image correlation (DIC); Digital microscopy system; STRAIN-RATE; CONCRETE; GROWTH; BEHAVIOR;
D O I：
10.1016/j.conbuildmat.2024.139815
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Three-point bending tests under the influence of different quasi-static loading rates were carried out on artificial rock using the MTS loading platform, and the crack propagation characteristics and fracture morphology of the specimens were investigated. The results show that DIC visualizes the development of strain field on the specimen surface and the precise crack pattern related to the applied load. The clear change of displacement field can accurately detect the damage location and degree of the specimen. The crack growth under quasi-static load shows a fast oscillatory mode. In addition, digital microscopes contribute to a better understanding of artificial rock mesoscopic failure mechanisms. The roughness of fracture is closely related to the meso-fracture mode and macro-fracture mode between aggregates. All these provide explanations for the correlation between loading rate and fracture mode and fracture roughness.
引用
收藏
页数：20
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