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Flat to slant ductile fracture transition: Tomography examination and simulations using shear-controlled void nucleation

Abstract : Tomography examination of arrested cracks at crack initiation, flat to slant transition and slant propagation indicates a clear change in micromechanisms from high-stress triaxiality void growth to shear-dominated coalescence in the slant regime. A Gurson-type model is used and a shear void nucleation term based on the Lode parameter for strain rate is suggested for simulation of a fully meshed sample, which achieves flat to slant crack transition at loads close to experimental results for aluminium.
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Submitted on : Tuesday, January 10, 2012 - 5:00:30 PM
Last modification on : Thursday, September 24, 2020 - 6:30:07 PM

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Thilo F. Morgeneyer, Jacques Besson. Flat to slant ductile fracture transition: Tomography examination and simulations using shear-controlled void nucleation. Scripta Materialia, Elsevier, 2011, 65, pp.1002-1005. ⟨10.1016/j.scriptamat.2011.09.004⟩. ⟨hal-00658608⟩

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