Fatigue Growth Behaviour of Two Interacting Cracks with Different Crack Offset

doi:10.3390/ma12213526

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	Fatigue Growth Behaviour of Two Interacting Cracks with Different Crack Offset
	Jin HJ(晋会锦)1; Cui B 2; Mao L 3
通讯作者	Jin, Huijin(jinhuijin863@163.com)
发表期刊	MATERIALS
	2019-11-01
卷号	12 期号:21 页码:9
摘要	Under cyclic fatigue load, multiple cracks would significantly deteriorate the service life of the components with respect to the case of a single crack owing to the crack interaction. The present study aims to explore the effect of crack interaction on the fatigue growth behaviour of samples with different crack offset. In this study, fatigue crack growth tests were performed for samples containing a single crack and non-collinear cracks of different crack offset in an aluminum-lithium alloy. It was shown that the two facing non-collinear cracks changed their growth direction when the cracks were overlapped, resulting in load mode transfers from mode I to I + II mixed mode. Then, the interaction behaviour was studied by establishing the finite element models to calculate the stress intensity factor K of samples with different crack offset. The results indicated that the K decreased, largely owing to the shielding effect as the two cracks overlapped, leading to retardation of crack growth in the position of overlap, especially for the specimens with a small crack offset. It was also shown that the interaction effect could change from positive to negative during the process of the multiple cracks' growth, thus leading to the acceleration or deceleration of crack growth rates, suggesting that the influence of interaction on cracks' growth behaviour could vary with the different stages of crack growth.
关键词	non-collinear cracks finite element analysis fatigue crack growth interacting behaviour
DOI	10.3390/ma12213526
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000502798800067
关键词[WOS]	INTENSITY FACTOR CALCULATION ; MULTIPLE CRACKS ; SIMULATION ; FRACTURE ; JOINTS
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
资助项目	National Ministry of Industry and Information Technology Project[M J-F-2011-34]
项目资助者	National Ministry of Industry and Information Technology Project
论文分区	二类
力学所作者排名	1
RpAuthor	Jin, Huijin
引用统计	被引频次：4[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/311007/81249
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.Anhui Univ Technol, Sch Mat Sci & Engn, Maanshan 243000, Peoples R China; 3.Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
推荐引用方式 GB/T 7714	Jin HJ,Cui B,Mao L. Fatigue Growth Behaviour of Two Interacting Cracks with Different Crack Offset[J]. MATERIALS,2019,12,21,:9.
APA	晋会锦,Cui B,&Mao L.(2019).Fatigue Growth Behaviour of Two Interacting Cracks with Different Crack Offset.MATERIALS,12(21),9.
MLA	晋会锦,et al."Fatigue Growth Behaviour of Two Interacting Cracks with Different Crack Offset".MATERIALS 12.21(2019):9.

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