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Notch Effects in Fatigue and Fracture

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    SYSNO ASEP0177631
    Document TypeM - Monograph Chapter
    R&D Document TypeMonograph Chapter
    TitleLocal characteristics of (brittle) failure assessed from Charpy type specimen
    Author(s) Dlouhý, Ivo (UFM-A) RID, ORCID
    Chlup, Zdeněk (UFM-A) RID, ORCID
    Holzmann, Miloslav (UFM-A)
    ISBN0-7923-6841-X
    Source TitleNotch Effects in Fatigue and Fracture / Pluvinage G. ; Gjonaj M.. - Dordrecht : Kluwer Academic publishers, 2001 ; Pluvinage G. ; Gjonaj M.
    Pagess. 127-146
    Number of pages20 s.
    Languageeng - English
    CountryNL - Netherlands
    Keywordslocal approach ; transferability ; brittle fracture initiation
    Subject RIVJL - Materials Fatigue, Friction Mechanics
    R&D ProjectsIAA2041003 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR)
    CEZAV0Z2041904 - UFM-A
    AnnotationLocal characteristics of predominantly brittle fracture have been analysed arising from the primary data obtained by using Charpy type specimens. Two model ferritic microstructures have been selected for knowledge presentation that differ significantly in their carbide thickness and scatter of fracture toughness data. Based on the deterministic approach to the analysis of cleavage failure under the notch root, the local fracture criteria have been evaluated using fracture micromechanism assessment combined with FEM calculations. The effective distances have been calculated from normal stress distributions and compared with depth of initiation point below the notch root measured from fracture surfaces. Accepting the Beremin approach to the analysis of cleavage failure criteria the local fracture parameters have been calculated for Charpy type specimen. For the microstructures investigated the Weibull stresses (location parameters) were related to cleavage fracture stresses determined supposing deterministic nature of cleavage fracture events at initiation. Microstructural and microfractographic reasons for scatter of data and connection to between local fracture criteria were determined.
    WorkplaceInstitute of Physics of Materials
    ContactYvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
    Year of Publishing2002

Number of the records: 1  

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