Dynamic response characteristics of dry and water-saturated schist under impact loading

doi:10.1007/s11629-019-5900-2

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2020 > Vol17 No.12

	Dynamic response characteristics of dry and water-saturated schist under impact loading
	Zhou Yang; Su Sheng-rui; Chen Jian-xun
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2020
卷号	17 期号:12 页码:3123-3136
关键词	Dry and water-saturated schist Triaxial stress constraint Modified triaxial split Hopkinson pressure bar Dynamic mechanical behavior Impact loading
ISSN号	1672-6316
DOI	10.1007/s11629-019-5900-2
英文摘要	Many geological engineering hazards are closely related to the dynamic mechanical properties of rock materials. However, most existing studies on the dynamic mechanical properties of rock materials were conducted on the hard rocks such as sandstone, granite, limestone, and marble, whereas soft rocks, such as schist, are less studied. Therefore, in this study, a series of triaxial impact tests were conducted on dry and saturated schist by employing a modified triaxial split Hopkinson pressure bar system to reveal the coupling effects of water, strain rate, and triaxial confining pressure on the mechanical properties of schist. The results show that schist is a type of watersensitive rock and the stress-strain curve of saturated schist has apparent ductility. The effects of strain rate on dynamic strain, deformation modulus and peak stress were analyzed. The results also show that the dynamic peak stress is affected by the combined softening effect and viscous effect of water under impact loading. Finally, it was found that the failure mode of schist belongs to typical axial tensile failure under uniaxial impact tests, and shear failure is the main failure mode under triaxial impact tests. With the increase in confining pressure, the failure modes of schist change from tensile failure to shear failure. This research can provide useful parameters for geological engineering hazard prevention in mountain areas.
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语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/57084]
专题	Journal of Mountain Science_Journal of Mountain Science-2020_Vol17 No.12
推荐引用方式 GB/T 7714	Zhou Yang,Su Sheng-rui,Chen Jian-xun. Dynamic response characteristics of dry and water-saturated schist under impact loading[J]. JOURNAL OF MOUNTAIN SCIENCE,2020,17(12):3123-3136.
APA	Zhou Yang,Su Sheng-rui,&Chen Jian-xun.(2020).Dynamic response characteristics of dry and water-saturated schist under impact loading.JOURNAL OF MOUNTAIN SCIENCE,17(12),3123-3136.
MLA	Zhou Yang,et al."Dynamic response characteristics of dry and water-saturated schist under impact loading".JOURNAL OF MOUNTAIN SCIENCE 17.12(2020):3123-3136.