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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
作者部门水下机器人研究室
关键词Hydrogen Embrittlement Strain
发表期刊Engineering Failure Analysis
ISSN1350-6307
2014
卷号44页码:74-84
收录类别SCI ; EI
EI收录号20142317786399
WOS记录号WOS:000341352800006
产权排序2
摘要The 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.
语种英语
WOS标题词Science & Technology ; Technology
WOS类目Engineering, Mechanical ; Materials Science, Characterization & Testing
关键词[WOS]DUCTILE FRACTURE ; TOPOGRAPHY ANALYSIS ; FRASTA ; CTOA ; STEEL
WOS研究方向Engineering ; Materials Science
引用统计
被引频次:1[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.sia.cn/handle/173321/15072
专题水下机器人研究室
通讯作者Cao, Yuguang
作者单位1.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
推荐引用方式
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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