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Experimental and numerical study of crack damage under variable amplitude thermal fatigue for compacted graphite iron EN-GJV-450

文献类型：期刊论文

作者Pan SN(潘斯宁); Yu G(虞钢); Li SX(李少霞); He XL(何秀丽); Chen R(陈茹)
刊名INTERNATIONAL JOURNAL OF FATIGUE
出版日期2018-08-01
卷号113页码:184-192
关键词Crack damage Variable amplitude thermal fatigue Surface wedging process Cast iron Combustion chamber
ISSN号0142-1123
DOI10.1016/j.ijfatigue.2018.04.010
英文摘要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.
分类号一类
URL标识查看原文
WOS关键词DIESEL-ENGINE ; HIGH-CYCLE ; PULSED-LASER ; YAG-LASER ; MECHANISMS ; CYLINDER ; BEHAVIOR ; STEEL
WOS研究方向Engineering, Mechanical ; Materials Science, Multidisciplinary
语种英语
WOS记录号WOS:000437373300017
资助机构National Natural Science Foundation of China [11272316, 11502269, 11672304, 11272317] ; Chinese Academy of Sciences [yz201636]
源URL[http://dspace.imech.ac.cn/handle/311007/77843]  
专题力学研究所_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
推荐引用方式
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.

入库方式： OAI收割

来源：力学研究所

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