Experimental and theoretical study of multiscale damage-failure transition in very high cycle fatigue

V. I. Betekhtin, A. G. Kadomtsev, M. V. Narykova, M. V. Bannikov, S. G. Abaimov, I. Sh Akhatov, T. Palin-Luc, O. B. Naimark

    Research output: Contribution to journalArticlepeer-review

    15 Citations (Scopus)

    Abstract

    Multiscale mechanisms of failure of metals (Armco iron, titanium, aluminum) are studied for high cycle and very high cycle fatigue. By correlating with the results of structural studies, a theoretical approach is developed to describe fatigue crack kinetics in damaged material under high cycle and very high cycle fatigue loading conditions. Stages of crack nucleation and propagation are analyzed using the profilometry data from the fracture surface. The scale invariance of fracture surface roughness is established, which allows an explanation of the self-similar nature of fatigue crack kinetics under high cycle and very high cycle fatigue. Variation of elastic-plastic properties of Armco iron under very high cycle fatigue is studied using an acoustic resonance method. It is found that the material density decreases during fatigue damage accumulation, with the minimum of the material density in the bulk of the specimen.

    Original languageEnglish
    Pages (from-to)78-89
    Number of pages12
    JournalPhysical Mesomechanics
    Volume20
    Issue number1
    DOIs
    Publication statusPublished - 1 Jan 2017

    Keywords

    • fatigue crack initiation and growth
    • fractography
    • fracture
    • scaling
    • very high cycle fatigue

    Fingerprint

    Dive into the research topics of 'Experimental and theoretical study of multiscale damage-failure transition in very high cycle fatigue'. Together they form a unique fingerprint.

    Cite this