Fakulteta za strojništvo, Ljubljana (FSLJ)
  • Impact of the yield-point phenomenon on measurement results of cyclic uniaxial tests [Elektronski vir]
    Žerovnik, Andrej, konstruiranje ; Kunc, Robert ; Prebil, Ivan
    Development and application of constitutive models for description of cyclic plasticity of a material usually requires experimental observation of material behaviour for the purpose of which ... uniaxially loaded test samples are often applied. Experimental observation is usually performed on purpose-built test stands, whereby strains are measured by means of clip-on extensometers or other similar measurement equipment. The material which is under observation at the level of a representative volume (within the measurement area) is presumably homogenous as well as its response, which applies to the elastic, elasto-plastic and viscoelastic area. It is evident that the aforementioned approach to plastic strain observation is not quite appropriate for materials exhibiting the yield-point phenomenon and consequently non-homogenous plastic strain within the stress (Lüders) plateau area. Despite the fact that the stress plateau is visible only at first transition of the yield point, it is evident that the yield-point phenomenon in uniaxial tests has a more significant impact than expected. This paper presents the problems of the aforementioned issue based on experimental observation and numerical simulations.
    Vir: Analytical, computational, and experimental inelasticity in deformable solids [Elektronski vir] : proceedings of PLASTICITY '13 (Str. 208-210)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2013
    Jezik - angleški
    COBISS.SI-ID - 12698907

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