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Article dans une revue
Microdamage modelling of crack initiation and propagation in FCC single crystals under complex loading conditions
Abstract : A regularised anisotropic continuum damage mechanics model is presented that couples crystal plasticity with damage induced on crystallographic planes. Two and three-dimensional finite element simulations of crack initiation and propagation in single crystal specimens under complex multiaxial loading with dominating shear are presented for the first time. The crack path in a four-point double notched shear specimen is predicted, in accordance with experimental testing of single crystal nickel-based superalloy AM1. The initiation, bifurcation and propagation of a crack in a shifted double notched specimen under creep conditions is then simulated and compared to the experimental response of nickel-based superalloy MC2 at high temperature. The attention is focused on the influence of coupling between viscoplasticity and damage on the crack path in these single crystals.
https://hal-mines-paristech.archives-ouvertes.fr/hal-01424994
Contributeur : Bibliothèque Umr7633 <>
Soumis le : mardi 3 janvier 2017 - 11:12:40
Dernière modification le : jeudi 24 septembre 2020 - 18:30:07
Contributeur : Bibliothèque Umr7633 <>
Soumis le : mardi 3 janvier 2017 - 11:12:40
Dernière modification le : jeudi 24 septembre 2020 - 18:30:07