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A novel method for failure analysis based on three-dimensional analysis of fracture surfaces
Cao, Yuguang; Nie, Wenjun; Yu JC(俞建成); Tanaka, Kiyoshi
Department水下机器人研究室
Source PublicationEngineering Failure Analysis
ISSN1350-6307
2014
Volume44Pages:74-84
Indexed BySCI ; EI
EI Accession number20142317786399
WOS IDWOS:000341352800006
Contribution Rank2
KeywordHydrogen Embrittlement Strain
AbstractThe fractured surfaces include a lot of useful information that can help investigate the reasons that caused metal materials to break. For example, the details on the processes that lead to failure can be determined from these surfaces, making it useful to investigate their morphology. The principle of the fracture-surface topography analysis (FRASTA) was used in this research and some progresses have been made on quantitative reverse deduction of metal fracture surfaces. In FRASTA, the fracture surfaces are scanned by laser microscope and the elevation data is recorded for analysis. The crack-tip opening angle (CTOA) was firstly determined by the cross-sectional plots. Simple bar hypothesis was then proposed. As for the hypothesis, the fracture surfaces can be assumed to be composed of independent rectangular bars. After dividing the plastic deformation left on the fracture surfaces into such single bars, the original lengths of these bars were calculated and then the global strains of these bars during the course of failure were calculated, and finally the J-integral was calculated. Then, the relationship between J-integral and crack opening displacement (COD), and the relationship between J-integral and fracture surface average profile for plain strain were deduced. Furthermore, according to the relationship between true stress and true strain for the material, the normal stress on the cross section of each single bar was determined. Summing up all the loads on all bars provided the total applied load of the specimen. Some experiments have been performed and the proposed methods have been verified to some extent. At the same time, software, namely fracture surface analyst (FSA) was developed as per the proposed methods and was used for analysis successfully. © 2014 Elsevier Ltd.
Language英语
WOS HeadingsScience & Technology ; Technology
WOS SubjectEngineering, Mechanical ; Materials Science, Characterization & Testing
WOS KeywordDUCTILE FRACTURE ; TOPOGRAPHY ANALYSIS ; FRASTA ; CTOA ; STEEL
WOS Research AreaEngineering ; Materials Science
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sia.cn/handle/173321/15072
Collection水下机器人研究室
Corresponding AuthorCao, Yuguang
Affiliation1.Department of Engineering Mechanics, China University of Petroleum, 266580 Qingdao, China
2.State Key Laboratory of Robotics, Shenyang Institute of Automation, Chinese Academy of Sciences, 110016 Shenyang, China
3.Department of Mechanical Systems Engineering, Toyama Prefectural University, 939-0398 Toyama, Japan
Recommended Citation
GB/T 7714
Cao, Yuguang,Nie, Wenjun,Yu JC,et al. A novel method for failure analysis based on three-dimensional analysis of fracture surfaces[J]. Engineering Failure Analysis,2014,44:74-84.
APA Cao, Yuguang,Nie, Wenjun,Yu JC,&Tanaka, Kiyoshi.(2014).A novel method for failure analysis based on three-dimensional analysis of fracture surfaces.Engineering Failure Analysis,44,74-84.
MLA Cao, Yuguang,et al."A novel method for failure analysis based on three-dimensional analysis of fracture surfaces".Engineering Failure Analysis 44(2014):74-84.
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