Loading rate effect on fracture process in Brazilian splitting tests of Beishan granites

doi:10.1088/1755-1315/861/4/042106

	Loading rate effect on fracture process in Brazilian splitting tests of Beishan granites
	Yu,Peiyang 1,2; Pan,Peng-Zhi 1,2; Wang,Zhaofeng 1,2; Miao,Shuting 1,2; Wu,Zhenhua 1,2; Shao,Changyue 1,2
刊名	IOP Conference Series: Earth and Environmental Science
	2021-10-01
卷号	861 期号:4
ISSN号	1755-1307
DOI	10.1088/1755-1315/861/4/042106
英文摘要	Abstract In the present study, to reveal the loading rate effect on fracture process in Beishan granite, a series of Brazilian splitting tests under conventionally monotonic loading and stepwise loading conditions were performed to observe the crack propagation process of granites, with the aid of a digital image correlation (DIC) technique. The fracture process zone (FPZ) length and opening displacement ahead of notch tips, and so on were measured, and the loading-rate dependence was acquired correspondingly. The experimental results show that the peak load, axial and lateral deformation of granite gradually increased with the increasing loading rate. With the increase in the loading rate, the stress level for fracture initiation decreased, while the critical opening displacement and FPZ length gradually increased. The granite underwent insignificant deformation during the constant stress loading period when a lower stress was applied. When a larger stress was applied, obvious three-stage creep deformation was observed. The opening displacement ahead of notch tips increased slowly at a constant rate during the primary and secondary creep stages, then exhibited an approximately exponential increase with increasing time during the tertiary creep. Moreover, the FPZ length of granite at the critical state under conventional loading was higher than that under stepwise loading. The inner mechanism is analyzed to explain the rate-dependent fracturing behavior.
语种	英语
出版者	IOP Publishing
WOS记录号	IOP:EES_861_4_042106
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/28448]
专题	中科院武汉岩土力学所
作者单位	1.University of Chinese Academy of Sciences, Beijing 100049, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China
推荐引用方式 GB/T 7714	Yu,Peiyang,Pan,Peng-Zhi,Wang,Zhaofeng,et al. Loading rate effect on fracture process in Brazilian splitting tests of Beishan granites[J]. IOP Conference Series: Earth and Environmental Science,2021,861(4).
APA	Yu,Peiyang,Pan,Peng-Zhi,Wang,Zhaofeng,Miao,Shuting,Wu,Zhenhua,&Shao,Changyue.(2021).Loading rate effect on fracture process in Brazilian splitting tests of Beishan granites.IOP Conference Series: Earth and Environmental Science,861(4).
MLA	Yu,Peiyang,et al."Loading rate effect on fracture process in Brazilian splitting tests of Beishan granites".IOP Conference Series: Earth and Environmental Science 861.4(2021).