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- W4311761743 endingPage "105167" @default.
- W4311761743 startingPage "105167" @default.
- W4311761743 abstract "Ductile fracture through growth and coalescence of intergranular cavities is a failure mode observed experimentally in many metallic alloys used in industrial applications. Simulation of this fracture process in polycrystalline aggregates requires modeling of the plastic yielding of porous boundaries. However, classical yield criteria for porous materials such as the Gurson–Tvergaard–Needleman model and its current extensions cannot account for the complex coupling between loading state, crystallographic orientations, void shape and material behavior at grain boundaries. In order to bridge this modeling gap, two yield criteria for intergranular ductile void growth are proposed. The first one is a GTN-like model derived from limit-analysis which, once calibrated, accounts for spherical voids at the interface of rate-independent crystals. The second one is developed from a variational approach and predicts yielding in viscoplastic crystals containing intergranular ellipsoidal cavities. Both models are validated against a wide database of numerical limit-analysis of porous bi-crystals using a FFT solver. Satisfying agreements are obtained, paving the way to microstructure-informed intergranular ductile fracture simulation. The interplay between plastic yielding inside grains and along grain boundaries is finally studied based on the proposed yield criteria." @default.
- W4311761743 created "2022-12-28" @default.
- W4311761743 creator A5040247697 @default.
- W4311761743 creator A5054773832 @default.
- W4311761743 creator A5067928823 @default.
- W4311761743 date "2023-03-01" @default.
- W4311761743 modified "2023-10-14" @default.
- W4311761743 title "Void growth yield criteria for intergranular ductile fracture" @default.
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