Fatigue crack growth in polycrystalline specimens was investigated considering a Ni-based superalloy, Haynes 230. The analyses were carried out through a comparison between experiments and numerical simulations. Crack closure experiments were conducted with digital image correlations: the crack closure was estimated by measuring the relative displacements of crack flanks. The experimental results were compared with crystal plasticity finite element simulations of randomly generated polycrystalline structures, in which the crack growth was simulated through a node release technique. The simulations provided a good estimation of the experimental results in terms of crack opening levels for different loading conditions.

Crack-closure simulations of Ni-based super-alloy polycrystal, a comparison between experiments and crystal plasticity

Luccarelli P. G.;Rabbolini S.;Beretta S.;Foletti S.
2019

Abstract

Fatigue crack growth in polycrystalline specimens was investigated considering a Ni-based superalloy, Haynes 230. The analyses were carried out through a comparison between experiments and numerical simulations. Crack closure experiments were conducted with digital image correlations: the crack closure was estimated by measuring the relative displacements of crack flanks. The experimental results were compared with crystal plasticity finite element simulations of randomly generated polycrystalline structures, in which the crack growth was simulated through a node release technique. The simulations provided a good estimation of the experimental results in terms of crack opening levels for different loading conditions.
3D finite element analysis; Crack closure; Crystal plasticity; Fatigue crack growth; Nickel-based alloy
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1122696
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