Tests and simulation for concrete crack propagation under impact load

被引：0
作者：
Zhang H. [1 ]
Guo J. [1 ]
Fu Y. [1 ]
Gao Q. [2 ]
Wang B. [1 ]
机构：
[1] College of Civil and Transportation Engineering, Hohai University, Nanjing
[2] Jiangsu Research Institute of Building Science Co., Ltd., Nanjing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2016年 / 35卷 / 17期
关键词：
Crack propagation; Flattened Brazilian disc; Fracture toughness; Hopkinson bar; Strain rate effect;
D O I：
10.13465/j.cnki.jvs.2016.17.018
中图分类号：
学科分类号：
摘要：
The radial spitting crack tests were conducted by using improved separated Hopkinson pressure bar (SHPB) for a flattened Brazilian disc (FBD) and a cracked straight through flattened Brazilian disc (CSTFBD) under different stain rates. Splitting tensile stress-radial strain curves of the flattened Brazilian disc, and dynamic elastic modulus, peak stress, peak strain and tensile strain rate sensitive coefficient effects of concrete with three different strength grades were obtained. In addition, the influences of pre-crack with different angles on the fracture toughness of the cracked straight through flattened Brazilian disc and the relationship between composite ratio of mixed mode cracks and loading angle were analyzed. The crack propagation and failure mechanism were studied. The test results and those of numerical simulation with the extended FE method were compared. The results showed that the growth trends of cracks with tests are consistent with those of numerical simulation. © 2016, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：107 / 112
页数：5
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