A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential

doi:10.1016/j.engfracmech.2021.108126

IMECH-IR > 流固耦合系统力学重点实验室

	A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential
	Lin QD(林钦栋)1; Li SH(李世海)2,3 ; Gan, Yundan 1; Feng C(冯春)2
通讯作者	Feng, Chun(fengchun@imech.ac.cn)
发表期刊	ENGINEERING FRACTURE MECHANICS
	2022
卷号	259 页码:21
ISSN	0013-7944
摘要	To characterize the dynamic mechanical response of rocks during the initiation and propagation of cracks at a high strain rate, a strain-rate cohesive fracture model is established based on the Lennard-Jones potential and multi-scale model of rocks. The newly proposed model explains the micro-mechanism of strain rate effect from the molecular scale and establishes the potential energy function and force function. First, it is proposed that the strain rate effect arises due to the change of microscopic properties of molecules at a high strain rate. Thereafter, the potential energy function and force function of the strain-rate cohesive fracture model corresponding to the dynamic tensile and shear processes are established. Finally, the accuracy of the strain-rate cohesive fracture model is verified through numerical simulations. The results indicate that the strain-rate cohesive fracture model can accurately simulate the dynamic tensile failure and shear failure of rocks at different strain rates. The dynamic tensile strength, dynamic compressive strength, and dynamic tensile fracture energy obtained by numerical simulations and laboratory tests are similar.
关键词	Strain-rate effect Cohesive fracture model Lennard-Jones potential CDEM
DOI	10.1016/j.engfracmech.2021.108126
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000729026400001
关键词[WOS]	DISCONTINUITY EMBEDDED APPROACH ; DYNAMIC FRACTURE ; ELEMENT ; PROPAGATION ; SIMULATION ; SANDSTONE ; EVOLUTION ; MARBLE ; ZONE ; CDEM
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：7[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/311007/87976
专题	流固耦合系统力学重点实验室
作者单位	1.Xian Modern Chem Res Inst, Xian 710065, Shaanxi, Peoples R China; 2.Chinese Acad Sci, Inst Mech, Key Lab Mech Fluid Solid Coupling Syst, Beijing 100190, Peoples R China; 3.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,Gan, Yundan,et al. A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential[J]. ENGINEERING FRACTURE MECHANICS,2022,259:21.
APA	林钦栋,李世海,Gan, Yundan,&冯春.(2022).A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential.ENGINEERING FRACTURE MECHANICS,259,21.
MLA	林钦栋,et al."A strain-rate cohesive fracture model of rocks based on Lennard-Jones potential".ENGINEERING FRACTURE MECHANICS 259(2022):21.

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