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  • High cycle thermo-mechanical fatigue : damage operator approach
    Nagode, Marko ; Hack, Michael ; Fajdiga, Matija
    The stress-life approach is standardized and widely accepted for determining fatigue damage under stress-controlled high cycle fatigue (HCF) loading. It was first extended to non-isothermal cases by ... introducing an equivalent temperature approach (ETA). The paper presents its extension, that is, the damage operator approach (DOA), enabling online continuous damage calculation for isothermal and non-isothermal loading with mean stress correction. The cycle closure point, cycle equivalent temperature, threshold temperature and separate rainflow counting, obligatory for the ETA, are not necessary for the DOA any more. Both approaches are equivalent for the second and subsequent runs of block loading if temperature is constant. However, for non-isothermal cases the DOA is within the worst- and the best-case scenarios of the ETA. Theapproaches are compared with the simple stress history and several thermo-mechanical fatigue (TMF) cycle types.
    Source: Fatigue & fracture of engineering materials & structures. - ISSN 8756-758X (Vol. 32, issue 6, 2009, str. 505-514)
    Type of material - article, component part
    Publish date - 2009
    Language - english
    COBISS.SI-ID - 10955291
    DOI

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