期刊论文

Energy dissipation of rock specimens under high strain rate with single joint in SHPB tensile tests

中文

岩土工程学报

Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering

1000-4548

2017

39

7

1336-1343

10.11779/CJGE201707021

国家自然科学基金项目(51474016,51674013)；

本校为其他机构

应用SHPB试验装置研究预制单节理岩石的能量耗散关系。使用SHPB试验系统,对高径比为0.5的完整花岗岩试样及预制单节理花岗岩试样进行高应变率下的冲击劈裂试验。在相同驱动气压下,改变加载方向与节理间的夹角,完成高应变率相同入射能下的冲击劈裂试验。对SHPB系统中的入射能、反射能、透射能及试样吸收能的时程变化规律进行了分析;从能量角度出发,分析冲击荷载作用下单节理岩石的能量耗散规律及其各向异性特征。结果表明:高应变率下,完整花岗岩试样在冲击劈裂试验中的吸收能随平均应变率增加而增加,表现出显著的应变率相关性;预制单节理岩石与加载方向之间夹角对破坏模式的影响明显,节理试样产生...

The energy dissipation in single jointed rocks under high strain rate is investigated by the split-Hopkinson pressure bar (SHPB) technique. The dynamic split tensile tests on both intact granite specimens and man-made single jointed granite specimens with a thickness-diameter ratio of 0.5 are carried out. The compressive analysis on the temporal responses of incident energy, reflection energy, transmission energy and absorbed energy stored in the rock specimens is performed. The anisotropy characteristics of energy dissipation of the jointed ro...