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  • Fatigue behaviour of thermal cutted steel structural element [Elektronski vir]
    Kramberger, Janez, 1963- ; Jezernik, Niko ; Glodež, Srečko
    This paper presents an investigation the effects of thermal cutting process on the fatigue life of selected structural elements. Thermal cutting process introduces a roughened surface on the cut edge ... and also changes in micro-structural properties of material in heat affected zone. A multi scale numerical approach for evaluation of crack initiation and propagation is presented. Crack initiation is dealt on micro scale model, while taking into account the effects of micro structural and geometrical changes at the cut edges of selected structural element. Residual stresses induced by the thermal loading are neglected. Individual grains of synthetic microstructure are simulated using Voronoi tessellation. Micro-crack initiation mechanism was based on Tanaka-Mura model. Some improvements were added to this model. Crack propagation is then solved on a macro scale model using linear elastic fracture mechanics approach. Some experimental testing was also performed so that the accuracy of the numerical model was checked. The results of proposed computational model show a reasonable correlation with experimental results.
    Vir: International Conference on Crack Paths (CP 2009), Vicenza (Italy), 23 - 25 September, 2009 [Elektronski vir] (Str. 261-272)
    Vrsta gradiva - prispevek na konferenci
    Leto - 2009
    Jezik - angleški
    COBISS.SI-ID - 13654038

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