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Numerical analyses of mesh size effects on core discing

文献类型：期刊论文

作者Lin, Songqing2; Zhang, Chuanqing2,3; Zhou, Hui2,3; Dai, Feng1
刊名ARABIAN JOURNAL OF GEOSCIENCES
出版日期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
DOI10.1007/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
WOS记录号WOS:000540440200003
出版者SPRINGER HEIDELBERG
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.

入库方式： OAI收割

来源：武汉岩土力学研究所

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