An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology

doi:10.1007/s00603-021-02368-4

	An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology
	Cui, Zhen 1,2,3,4,5; Qian, Sheng 3,5; Zhang, Guimin 2; Maochu, Zhang 3,5
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2021-02-03
页码	15
关键词	Rock material Brazilian test Loading rate Tensile strength Fracture surface morphology
ISSN号	0723-2632
DOI	10.1007/s00603-021-02368-4
英文摘要	To investigate the effect of the loading rate on the tensile strength of rock material and the morphology of the resulting split fracture surfaces, three types of rock specimens, namely, granite, basalt and limestone, were collected and tested with Brazilian testing under different loading rates. The tensile strength was measured, and the effect of the loading rate on the tensile strength of the rock material was studied. Digital terrain map models of the split fracture surface were obtained with an optical 3D scanning technique, and the effects of the loading rate on the geometry and morphology of the fracture surface were studied. The influence of the loading rate and tensile strength on the roughness was studied quantitatively by calculating the roughness indices of a fracture surface for all three kinds of rock. The research results show that the rock tensile strength increases with the loading rate. A linear relationship was established in double-logarithmic coordinates to describe the relationship between the tensile strength and the loading rate. Four different roughness indices were used to describe the morphology of the split fracture surface. The analysis results show that the magnitudes of all the roughness indices increase with the loading rate. Additionally, the roughness indices for all three types of rock linearly increase with the tensile strength. This linear trend indicates that it is possible to utilize fracture surface roughness indices to estimate rock tensile strength. The current study may motivate further research on the relationship between the morphology indices of rock fractures and mechanical parameters of the rock.
资助项目	National Key Research and Development Program of China[2016YFC0401803] ; National Natural Science Foundation of China[41672319] ; National Natural Science Foundation of China[51779253] ; National Natural Science Foundation of China[52079133] ; National Natural Science Foundation of China[51709258] ; Major project of the National Basic Research Program of China[51991393] ; Key Laboratory for Geo-Mechanics and Deep Underground Engineering, China University of Mining Technology[SKLGDUEK1912] ; CRSRI Open Research Program[SN: CKWV2019746/KY] ; MOE Key Lab of Disaster Forecast and Control in Engineering, Jinan University[20200904002] ; Youth Innovation Promotion Association, CAS
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000614341500007
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25672]
专题	中科院武汉岩土力学所
通讯作者	Cui, Zhen
作者单位	1.Changjiang River Sci Res Inst, Minist Water Resources, Key Lab Geotech Mech & Engn, Wuhan 430010, Hubei, Peoples R China 2.China Univ Min & Technol, State Key Lab GeoMech & Deep Underground Engn, Xuzhou 221116, Jiangsu, Peoples R China 3.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech, Wuhan 430071, Hubei, Peoples R China 4.Jinan Univ, MOE Key Lab Disaster Forecast & Control Engn, Guangzhou 510632, Guangdong, Peoples R China 5.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 10049, Peoples R China
推荐引用方式 GB/T 7714	Cui, Zhen,Qian, Sheng,Zhang, Guimin,et al. An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology[J]. ROCK MECHANICS AND ROCK ENGINEERING,2021:15.
APA	Cui, Zhen,Qian, Sheng,Zhang, Guimin,&Maochu, Zhang.(2021).An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology.ROCK MECHANICS AND ROCK ENGINEERING,15.
MLA	Cui, Zhen,et al."An Experimental Investigation of the Influence of Loading Rate on Rock Tensile Strength and Split Fracture Surface Morphology".ROCK MECHANICS AND ROCK ENGINEERING (2021):15.