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Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude
Pan SN(潘斯宁); Chen R(陈茹)
Corresponding AuthorPan, Sining(supereve122@163.com)
Source PublicationENGINEERING FAILURE ANALYSIS
2019-08-01
Volume102Pages:284-292
ISSN1350-6307
AbstractWith the development of engine and environmental protection, thermal cracking has become one of the main failure modes of components and materials working under complex thermal conditions. The fatigue microcrack and evolution prediction model of compacted graphite iron under thermal fatigue with variable amplitude is studied in this paper, which is induced by pulsed laser. According to the different length, microcracks shorter than 0.1 mm and longer than 0.3 mm are defined as "secondary microcrack" and "main microcrack", respectively. Results show that, the secondary microcrack caused by the superimposed high-cycle thermal loading shows different behavior of initiation and propagation with the main microcrack. The propagation of secondary microcrack usually limits in a eutectic cell, because that the energy provided in the high-cycle stage is not enough to break across the eutectic boundary. However, the main microcrack can propagate across the eutectic boundary because of enough energy provided in the low-cycle stage. With consideration of both plastic strain energy density and elastic strain energy density, a modified Paris-type model is proposed based on fractal theory. The threshold Delta W-th is introduced to evaluate the damage contribution of elastic strain energy density. The proposed model is helpful for lifetime prediction of components and materials working under thermal fatigue with variable amplitude.
KeywordCrack Thermal fatigue Variable amplitude Evolution prediction Compacted graphite iron
DOI10.1016/j.engfailanal.2019.04.043
Indexed BySCI ; EI
Language英语
WOS IDWOS:000467804800024
WOS KeywordTHERMOMECHANICAL FATIGUE ; LASER ; PROPERTY ; DAMAGE
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Mechanical ; Materials Science, Characterization & Testing
Funding ProjectDoctor's Scientific Research Foundation of Hezhou University[HZUBS201806] ; Hezhou Foundation Research and Development of Science and Technology[201707007] ; Hezhou Foundation Research and Development of Science and Technology[201808011] ; Teaching Reform Project for Higher Education Undergraduate Course of Guangxi Education Department[2015JGA360]
Funding OrganizationDoctor's Scientific Research Foundation of Hezhou University ; Hezhou Foundation Research and Development of Science and Technology ; Teaching Reform Project for Higher Education Undergraduate Course of Guangxi Education Department
Classification二类
Ranking1
ContributorPan, Sining
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/80693
Collection先进制造工艺力学实验室
Recommended Citation
GB/T 7714
Pan SN,Chen R. Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude[J]. ENGINEERING FAILURE ANALYSIS,2019,102:284-292.
APA 潘斯宁,&陈茹.(2019).Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude.ENGINEERING FAILURE ANALYSIS,102,284-292.
MLA 潘斯宁,et al."Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude".ENGINEERING FAILURE ANALYSIS 102(2019):284-292.
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