Numerical analyses of mesh size effects on core discing

doi:10.1007/s12517-020-05389-5

	Numerical analyses of mesh size effects on core discing
	Lin, Songqing 2; Zhang, Chuanqing 2,3; Zhou, Hui 2,3; Dai, Feng 1
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2020-06-06
卷号	13 期号:12 页码:11
关键词	Core discing Mesh size effect Numerical simulations Strain-softening model Tensile failure Shearing failure
ISSN号	1866-7511
DOI	10.1007/s12517-020-05389-5
英文摘要	Although the nonlinear numerical methods to study core discing mechanisms have their merits in terms of linear elastic models, the effects of mechanical parameters and mesh size in numerical simulations still have limits on the accuracy of the results. To address this problem, a parametric sensitivity analysis was conducted to understand the influence of shear and tensile mechanical parameters and mesh size on the numerical results of core discing. Numerical results show that the shear and tensile mechanical parameters have a "cliff effect" on the core discing process. The mechanical responses of the core, the borehole sidewall, and the bottom of the kerf were also contributing to this effect. Next, the simulations using different mesh sizes were conducted to achieve a best fit between the stress-strain curves and the failure modes. Finally, a method was introduced to eliminate the mesh size effects on rock discing in our numerical simulations.
资助项目	National Natural Science Foundation of China (NSFC)[41941018] ; National Natural Science Foundation of China (NSFC)[U1865203] ; Youth Innovation Promotion Association, Chinese Academy of Sciences (CAS)
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000540440200003
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24309]
专题	中科院武汉岩土力学所
通讯作者	Zhang, Chuanqing
作者单位	1.Sichuan Univ, State Key Lab Hydraul & Mt River Engn, Chengdu 610065, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lin, Songqing,Zhang, Chuanqing,Zhou, Hui,et al. Numerical analyses of mesh size effects on core discing[J]. ARABIAN JOURNAL OF GEOSCIENCES,2020,13(12):11.
APA	Lin, Songqing,Zhang, Chuanqing,Zhou, Hui,&Dai, Feng.(2020).Numerical analyses of mesh size effects on core discing.ARABIAN JOURNAL OF GEOSCIENCES,13(12),11.
MLA	Lin, Songqing,et al."Numerical analyses of mesh size effects on core discing".ARABIAN JOURNAL OF GEOSCIENCES 13.12(2020):11.