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

doi:10.1016/j.engfracmech.2021.107627

IMECH-IR > 流固耦合系统力学重点实验室

	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)1 ; Wang XQ(王心泉)1,2
通讯作者	Feng, Chun(fengchun@imech.ac.cn)
发表期刊	ENGINEERING FRACTURE MECHANICS
	2021-04-01
卷号	246 页码:26
ISSN	0013-7944
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.
关键词	Multi-scale model Lennard-Jones potential Cohesive fracture model Fracture energy
DOI	10.1016/j.engfracmech.2021.107627
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000632170000001
WOS研究方向	Mechanics
WOS类目	Mechanics
资助项目	National Key Research and Development Project of China ; Ministry of Science and Technology of China[2018YFC1505504]
项目资助者	National Key Research and Development Project of China ; Ministry of Science and Technology of China
论文分区	二类/Q1
力学所作者排名	1
RpAuthor	Feng, Chun
引用统计	被引频次：6[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/86214
专题	流固耦合系统力学重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, 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.

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