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On the temperature independence of statistical model parameters for cleavage fracture in ferritic steels
Qian GA(钱桂安); Lei WS; Niffenegger M; Gonzalez-Albuixech VF
2018-02-06
发表期刊PHILOSOPHICAL MAGAZINE
卷号98期号:11页码:959-1004
ISSN1478-6435
摘要The work relates to the effect of temperature on the model parameters in local approaches (LAs) to cleavage fracture. According to a recently developed LA model, the physical consensus of plastic deformation being a prerequisite to cleavage fracture enforces any LA model of cleavage fracture to observe initial yielding of a volume element as its threshold stress state to incur cleavage fracture in addition to the conventional practice of confining the fracture process zone within the plastic deformation zone. The physical consistency of the new LA model to the basic LA methodology and the differences between the new LA model and other existing models are interpreted. Then this new LA model is adopted to investigate the temperature dependence of LA model parameters using circumferentially notched round tensile specimens. With the published strength data as input, finite element (FE) calculation is conducted for elastic-perfectly plastic deformation and the realistic elastic-plastic hardening, respectively, to provide stress distributions for model calibration. The calibration results in temperature independent model parameters. This leads to the establishment of a master curve' characteristic to synchronise the correlation between the nominal strength and the corresponding cleavage fracture probability at different temperatures. This master curve' behaviour is verified by strength data from three different steels, providing a new path to calculate cleavage fracture probability with significantly reduced FE efforts.
关键词Ferritic steels plastic yielding cleavage fracture statistical model temperature effect model calibration
DOI10.1080/14786435.2018.1425011
URL查看原文
收录类别SCI ; EI
语种英语
WOS记录号WOS:000426138800003
关键词[WOS]PRESSURIZED THERMAL SHOCKS ; LOCAL APPROACH ; BRITTLE-FRACTURE ; STRUCTURAL-STEELS ; PART I ; TRANSGRANULAR CLEAVAGE ; MICROALLOYED STEELS ; MASTER CURVE ; INITIATION ; TOUGHNESS
WOS研究方向Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter
WOS类目Materials Science ; Metallurgy & Metallurgical Engineering ; Physics
项目资助者PROBAB Project by the Swiss Federal Nuclear Safety Inspectorate (ENSI) (DIS-Vertrag) [H-100668]
论文分区二类
力学所作者排名1
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77959
专题非线性力学国家重点实验室
作者单位1.[Qian, Guian; Niffenegger, M.] Paul Scherrer Inst, Nucl Energy & Safety Dept, Lab Nucl Mat, Villigen, Switzerland
2.Appl Mat Inc, Sunnyvale, CA USA
3.Gonzalez-Albuixech, V. F.] Univ Politecn Valencia, CIIM, Valencia, Spain
4.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing, Peoples R China
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Qian GA,Lei WS,Niffenegger M,et al. On the temperature independence of statistical model parameters for cleavage fracture in ferritic steels[J]. PHILOSOPHICAL MAGAZINE,2018,98(11):959-1004.
APA 钱桂安,Lei WS,Niffenegger M,&Gonzalez-Albuixech VF.(2018).On the temperature independence of statistical model parameters for cleavage fracture in ferritic steels.PHILOSOPHICAL MAGAZINE,98(11),959-1004.
MLA 钱桂安,et al."On the temperature independence of statistical model parameters for cleavage fracture in ferritic steels".PHILOSOPHICAL MAGAZINE 98.11(2018):959-1004.
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