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Fatigue Growth Behaviour of Two Interacting Cracks with Different Crack Offset
Jin HJ(晋会锦)1; Cui B2; Mao L3
Corresponding AuthorJin, Huijin(jinhuijin863@163.com)
Source PublicationMATERIALS
2019-11-01
Volume12Issue:21Pages:9
AbstractUnder 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.
Keywordnon-collinear cracks finite element analysis fatigue crack growth interacting behaviour
DOI10.3390/ma12213526
Indexed BySCI ; EI
Language英语
WOS IDWOS:000502798800067
WOS KeywordINTENSITY FACTOR CALCULATION ; MULTIPLE CRACKS ; SIMULATION ; FRACTURE ; JOINTS
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
Funding ProjectNational Ministry of Industry and Information Technology Project[M J-F-2011-34]
Funding OrganizationNational Ministry of Industry and Information Technology Project
Classification二类
Ranking1
ContributorJin, Huijin
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/81249
Collection非线性力学国家重点实验室
Affiliation1.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
Recommended Citation
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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