Model reduction strategy applied to a problem of crack propagation in anisotropic materials

Abstract : In order to predict the life of high pressure turbine blades, a damage tolerance approach must be set. This approach requires a study of crack propagation. Furthermore, these components can be made as single crystals which creates a challenge in studying crack propagation in anisotropic materials. Instead of running expensive elastic-plastic computations, an elastic analysis is applied over the whole structure while a confined elastic-plastic one, fed by the previous, is processed on the K-dominance zone around the crack tip. Kinematic fields from these analyses are projected on a reduced basis in order to obtain a non-local condensed model that serves as an input for an incremental model. This condensed model gives a variation of blunting intensity factors of different modes as a function of the loading given through stress intensity factors.
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Contributor : Yoann Guilhem <>
Submitted on : Thursday, October 25, 2018 - 1:34:48 PM
Last modification on : Tuesday, May 14, 2019 - 10:18:18 AM
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  • HAL Id : hal-01903890, version 1

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Walid Tezeghdanti, Sylvie Pommier, Yoann Guilhem. Model reduction strategy applied to a problem of crack propagation in anisotropic materials. Colloque National Mécamat Aussois 2017 « Fatigue des Structures et des Matériaux », Jan 2017, Aussois, France. 2017. ⟨hal-01903890⟩

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