On enrichment strategies and methods to extract stress intensity factors using extended finite element method for bimaterials

doi:10.1016/j.engfracmech.2023.109060

IMECH-IR > 非线性力学国家重点实验室

	On enrichment strategies and methods to extract stress intensity factors using extended finite element method for bimaterials
	Ru M(茹敏); Liu CQ(刘传奇); Wei YJ(魏宇杰)
发表期刊	ENGINEERING FRACTURE MECHANICS
	2023-03-28
卷号	281 页码:109060
ISSN	0013-7944
摘要	The eXtended Finite Element Method (X FEM) is a versatile tool to model cracks and interfaces where sharp gradients and even discontinuity of deformation across the interface may occur. The enrichment functions are introduced to depict possible discontinuity and singularity known from analytical solutions. For bimaterials, the gradients of the displacements are discontinuous across the interface, which can be modeled by ramp functions. In this work, we check the role of the enrichment strategies with and without ramp functions for the accuracy of enriching schemes, and also compare three different methods, i.e. the Interaction Integral Method (IIM), Contour Integration Method (CIM), and Displacement Correlation Method (DCM), to extract the Stress Intensity Factors (SIFs). Both planar and non planar examples are employed to examine the enriching strategies and the three SIF extraction methods. We find that the enriched ramp functions can improve the accuracy in terms of strain energy, but do not significantly affect the SIFs. The IIM is the best choice to extract SIFs and the DCM can provide enough accuracy with a careful choice of extraction parameters. This work can help a reader when choose the enriching strategies and the extraction methods of the SIFs for interface cracks between dissimilar materials.
关键词	X FEM Bimaterial Enriching scheme Stress intensity factor
DOI	10.1016/j.engfracmech.2023.109060
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000926489500001
WOS研究方向	Mechanics
WOS类目	Mechanics
项目资助者	National Natural Science Foundation of China, China (NSFC) [11988102, 11790291] ; NSFC, China [12172368] ; One Hundred Talents Program of Chinese Academy of Sciences (CAS) , China
论文分区	一类
力学所作者排名	1
RpAuthor	Liu, CQ ; Wei, YJ (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91800
专题	非线性力学国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Future Technol, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Ru M,Liu CQ,Wei YJ. On enrichment strategies and methods to extract stress intensity factors using extended finite element method for bimaterials[J]. ENGINEERING FRACTURE MECHANICS,2023,281:109060.
APA	茹敏,刘传奇,&魏宇杰.(2023).On enrichment strategies and methods to extract stress intensity factors using extended finite element method for bimaterials.ENGINEERING FRACTURE MECHANICS,281,109060.
MLA	茹敏,et al."On enrichment strategies and methods to extract stress intensity factors using extended finite element method for bimaterials".ENGINEERING FRACTURE MECHANICS 281(2023):109060.

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