Cohesive fracture model of rocks based on multi-scale model and Lennard-Jones potential

doi:10.1016/j.engfracmech.2021.107627

CORC > 力学研究所 > 中国科学院力学研究所 > 流固耦合系统力学重点实验室(2012-)

	Cohesive fracture model of rocks based on multi-scale model and Lennard-Jones potential
	Lin QD(林钦栋)1,2; Li SH(李世海)1,2; Feng C(冯春)2; Wang XQ(王心泉)1,2
刊名	ENGINEERING FRACTURE MECHANICS
	2021-04-01
卷号	246 页码:26
关键词	Multi-scale model Lennard-Jones potential Cohesive fracture model Fracture energy
ISSN号	0013-7944
DOI	10.1016/j.engfracmech.2021.107627
通讯作者	Feng, Chun(fengchun@imech.ac.cn)
英文摘要	With the aim of modelling the energy dissipation phenomenon during the initiation and propagation of cracks, a novel cohesive fracture model is proposed in this study based on the multiscale model of rocks and the Lennard-Jones potential between non-bonding molecules. The proposed model establishes the corresponding relationship of deformation in the multi-scale model of rocks and suggests that the fracture energy is essentially the manifestation of the transformation of deformation energy into potential energy between molecules. First, the multiscale model of rocks is established based on the structural characteristics and fracture characteristics of rocks, and the corresponding relation of deformation at different scales is analysed. Thereafter, the force and potential energy equations of the cohesive fracture model corresponding to the tensile and shear processes are established. Finally, the accuracy of the cohesive fracture model is verified through three numerical simulations. The results indicate that the cohesive fracture model can accurately fit the theoretical values and experimental results in the Mode-I and Mode-II tests. In the uniaxial compression test, the cohesive fracture model can accurately simulate the uniaxial compressive strength and fracture pattern of rocks.
分类号	二类/Q1
资助项目	National Key Research and Development Project of China ; Ministry of Science and Technology of China[2018YFC1505504]
WOS研究方向	Mechanics
语种	英语
WOS记录号	WOS:000632170000001
资助机构	National Key Research and Development Project of China ; Ministry of Science and Technology of China
其他责任者	Feng, Chun
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/86213]
专题	力学研究所_流固耦合系统力学重点实验室(2012-)
作者单位	1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China;
推荐引用方式 GB/T 7714	Lin QD,Li SH,Feng C,et al. Cohesive fracture model of rocks based on multi-scale model and Lennard-Jones potential[J]. ENGINEERING FRACTURE MECHANICS,2021,246:26.
APA	林钦栋,李世海,冯春,&王心泉.(2021).Cohesive fracture model of rocks based on multi-scale model and Lennard-Jones potential.ENGINEERING FRACTURE MECHANICS,246,26.
MLA	林钦栋,et al."Cohesive fracture model of rocks based on multi-scale model and Lennard-Jones potential".ENGINEERING FRACTURE MECHANICS 246(2021):26.