Experimental Study on Stress Wave Propagation Crossing the Jointed Specimen with Different JRCs

doi:10.1155/2021/3096253

	Experimental Study on Stress Wave Propagation Crossing the Jointed Specimen with Different JRCs
	Hong, S. N.2,3; Li, H. B.3; Rong, L. F.1
刊名	SHOCK AND VIBRATION
	2021-11-03
卷号	2021 页码:12
ISSN号	1070-9622
DOI	10.1155/2021/3096253
英文摘要	Most of the rock masses in the outer crust of the Earth are discontinuous. They are divided by joints, faults, fractures, etc. And those discontinuities, generally referred to as joints, greatly affect the property of the rock masses. The paper experimentally investigates the stress wave propagation crossing the jointed specimens. The tests were conducted on the split Hopkinson pressure bar (SHPB). The test specimens consist of two parts cast by cement mortar. Both parts have an irregular surface, and they were designed to match each other completely. The surfaces where two parts meet make an artificial joint. The surfaces of the joints were scanned by a three-dimensional scanner to obtain its actual topography and then to calculate the roughness of the surface, i.e., the joint roughness coefficient (JRC). A set of jointed specimens with JRC ranging from 0 to 20 were made and used in dynamic compression experiments. During the tests, signals were captured by strain gauges stuck on the incident and transmitted bars of the SHPB apparatus. The incident, reflected, and transmitted waves across the jointed specimens were obtained from the test records. We found out that more stress wave would transmit through the jointed specimen with larger JRC. Besides, collected data were processed to get the dynamic stress-strain relation of jointed specimens and the stress-closure curves of the joints. The results show that the joint increases the deformation of the specimen, and the stiffness of the jointed specimen would increase slightly when the joint is rougher.
资助项目	Chinese National Science Research Fund[41525009] ; Chinese National Science Research Fund[41831281] ; Chinese National Science Research Fund[51439008] ; National Science Foundation of Hebei Province of China[E2019210291]
WOS研究方向	Acoustics ; Engineering ; Mechanics
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000719676800003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28276]
专题	中科院武汉岩土力学所
通讯作者	Li, H. B.
作者单位	1.Shijiazhuang Tiedao Univ, Key Lab Struct Hlth Monitoring & Control, Shijiazhuang 050043, Hebei, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Hong, S. N.,Li, H. B.,Rong, L. F.. Experimental Study on Stress Wave Propagation Crossing the Jointed Specimen with Different JRCs[J]. SHOCK AND VIBRATION,2021,2021:12.
APA	Hong, S. N.,Li, H. B.,&Rong, L. F..(2021).Experimental Study on Stress Wave Propagation Crossing the Jointed Specimen with Different JRCs.SHOCK AND VIBRATION,2021,12.
MLA	Hong, S. N.,et al."Experimental Study on Stress Wave Propagation Crossing the Jointed Specimen with Different JRCs".SHOCK AND VIBRATION 2021(2021):12.