Computationally efficient modelling of short fatigue crack growth using dislocation formulations

Per Hansson, Solveig Melin, Christer Persson

    Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskriftPeer review

    Sammanfattning

    Abstract in Undetermined
    In an attempt to develop it computationally efficient model for simulation of fatigue crack growth of microstructurally short cracks two dislocation based models have been compared. In both models, the geometry of the boundary and the crack is described using dislocation dipole elements, whereas the plasticity is described either by discrete dislocations or by distributed dipole elements. The two models were found to agree qualitatively its well as quantitatively. It was concluded that modelling the plasticity by dipole elements becomes comparatively increasingly more time efficient with increasing grain size plastic zone size. However, plasticity modelling by dipole elements showed to provide somewhat higher crack growth rates.
    Originalspråkengelska
    Sidor (från-till)3189-3205
    TidskriftEngineering Fracture Mechanics
    Volym75
    Nummer10
    DOI
    StatusPublished - 2008

    Ämnesklassifikation (UKÄ)

    • Materialteknik
    • Teknisk mekanik

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