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Experimental and numerical study of crack damage under variable amplitude thermal fatigue for compacted graphite iron EN-GJV-450
Pan SN(潘斯宁); Yu G(虞钢); Li SX(李少霞); He XL(何秀丽); Chen R(陈茹)
2018-08-01
发表期刊INTERNATIONAL JOURNAL OF FATIGUE
卷号113页码:184-192
ISSN0142-1123
摘要Fatigue crack under variable amplitude thermal cycles is a common failure in combustion chamber components, proposing great challenges during the temperature reproduction of actual working condition. In this paper, this complicated thermal cycle was realized with pulsed laser experimentally, causing two kinds of damage such as the low cycle thermal fatigue (LCF) and high cycle thermal fatigue (HCF). A numerical model was developed to simulate the temperature, stress and strain under variable amplitude thermal cycles. The results showed that, there was good agreement between the measured temperature curve and the simulated results with different crack parameters. The observed crack depth at different cycles was consistent with the predicted ones. Furthermore, the mechanism of crack evolution under variable amplitude thermal fatigue was discussed. The calculated thermal-structural interaction depth of LCF thermal cycle was found to be larger than the HCF thermal cycle. The effect of LCF thermal loadings was associated with the initiation of major cracks, while the failure related to the superimposed HCF action was the acceleration of crack growth with a surface wedging process. This paper provides comprehensive experimental and numerical insights into the thermal damage process under variable amplitude thermal loading, showing a significant engineering value for failure analysis and design optimization of combustion chamber components.
关键词Crack damage Variable amplitude thermal fatigue Surface wedging process Cast iron Combustion chamber
DOI10.1016/j.ijfatigue.2018.04.010
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000437373300017
关键词[WOS]DIESEL-ENGINE ; HIGH-CYCLE ; PULSED-LASER ; YAG-LASER ; MECHANISMS ; CYLINDER ; BEHAVIOR ; STEEL
WOS研究方向Engineering, Mechanical ; Materials Science, Multidisciplinary
WOS类目Engineering ; Materials Science
项目资助者National Natural Science Foundation of China [11272316, 11502269, 11672304, 11272317] ; Chinese Academy of Sciences [yz201636]
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力学所作者排名1
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文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77843
专题先进制造工艺力学重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, Beijing, Peoples R China
2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China
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GB/T 7714
Pan SN,Yu G,Li SX,et al. Experimental and numerical study of crack damage under variable amplitude thermal fatigue for compacted graphite iron EN-GJV-450[J]. INTERNATIONAL JOURNAL OF FATIGUE,2018,113:184-192.
APA 潘斯宁,虞钢,李少霞,何秀丽,&陈茹.(2018).Experimental and numerical study of crack damage under variable amplitude thermal fatigue for compacted graphite iron EN-GJV-450.INTERNATIONAL JOURNAL OF FATIGUE,113,184-192.
MLA 潘斯宁,et al."Experimental and numerical study of crack damage under variable amplitude thermal fatigue for compacted graphite iron EN-GJV-450".INTERNATIONAL JOURNAL OF FATIGUE 113(2018):184-192.
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