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Faculty of Mechanical Engineering, Lj. (FSLJ)
  • Observation of the low-cycle fatigue damage of materials exhibiting the yield-point phenomenon [Elektronski vir]
    Žerovnik, Andrej, konstruiranje ; Prebil, Ivan
    Determination of the low-cycle lifetime of products is often based on a combination of experimental tests and numerical simulations of the stress-strain state and damage, whereby various approaches ... or numerical models are applied. All models require determination of material parameters, which is usually based on results obtained through cyclic uniaxial tension-compression tests. It is presupposed that the material under observation is homogenous in terms of a representative volume and therefore its response within the measuring range is the same or homogenous at each point. With materials exhibiting the yield-point phenomenon and thereby also non-homogenous plastic strain within the stress (Lüders) plateau, the strain state within the observed measuring range is not homogenous. Despite the fact that the stress plateau occurs only at first transition of the yield point, the authors have discovered that the yield-point phenomenon in uniaxial tests affects the cyclic plasticity of uniaxially loaded specimens and consequently determination of material damage resulting from the low-cycle fatigue. The paper presents the impact of the yield-point phenomenon on determination of the damage resulting from the low-cycle material fatigue.
    Source: Plastic behavior of conventional and advanced materials [Elektronski vir] : theory, experiment, and modeling : proceedings of Plasticity ʼ15 (Datoteka Zerovnik (1 f.))
    Type of material - conference contribution
    Publish date - 2015
    Language - english
    COBISS.SI-ID - 13927963

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