Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen

doi:10.1016/j.engfracmech.2011.06.022

CORC > 武汉岩土力学研究所 > 中科院武汉岩土力学所 > 岩土力学所知识全产出 > 期刊论文

	Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen
	Zheng, H.1,2,3; Wang, Y. X.2,3; Xia, K.1,2,3; Dai, F.2,3
刊名	ENGINEERING FRACTURE MECHANICS
	2011
卷号	78 期号:15 页码:2633-2644
关键词	Dynamic rock fracture CCNSCB Dynamic initiation toughness Dynamic propagation toughness Fracture energy Stable-unstable crack transition
ISSN号	0013-7944
DOI	10.1016/j.engfracmech.2011.06.022
英文摘要	Rock dynamic fractures are common in many geophysical processes and engineering applications. Characterization of rock dynamic fracture properties such as the initiation fracture toughness, the fracture energy, and the fracture velocity, is thus of great importance in rock mechanics. A novel method is proposed in this work to measure dynamic Mode-I rock fracture parameters using a cracked chevron notched semi-circular bend (CCNSCB) specimen loaded by a split Hopkinson pressure bar (SHPB) apparatus. A strain gauge is mounted on the sample surface near the chevron notch to detect the fracture onset, and a laser gap gauge (LGG) is used to monitor the crack surface opening distance (CSOD) during the dynamic test. With dynamic force balance achieved in the tests, the stable-unstable transition of the crack propagation crack is observed and the initiation fracture toughness is calculated from the dynamic peak load. The average dynamic fracture energy as well as the fracture propagation toughness are calculated based on the first law of thermodynamics. The measured dynamic fracture properties of Laurentian granite using CCNSCB method are consistent with those reported in the literature using other methods. (C) 2011 Elsevier Ltd. All rights reserved.
WOS研究方向	Mechanics
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000296267100001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/3308]
专题	岩土力学所知识全产出_期刊论文国家重点实验室知识产出_期刊论文
作者单位	1.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech 2.Univ Toronto, Dept Civil Engn; 3.Univ Toronto, Lassonde Inst;
推荐引用方式 GB/T 7714	Zheng, H.,Wang, Y. X.,Xia, K.,et al. Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen[J]. ENGINEERING FRACTURE MECHANICS,2011,78(15):2633-2644.
APA	Zheng, H.,Wang, Y. X.,Xia, K.,&Dai, F..(2011).Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen.ENGINEERING FRACTURE MECHANICS,78(15),2633-2644.
MLA	Zheng, H.,et al."Determination of dynamic rock Mode-I fracture parameters using cracked chevron notched semi-circular bend specimen".ENGINEERING FRACTURE MECHANICS 78.15(2011):2633-2644.