A Multiscale Approach to Polycrystalline Materials Damage and Failure

Ivano Benedetti; Ferri M.H.Aliabadi

doi:10.4028/www.scientific.net/KEM.627.33

Paper Titles

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Definition of a Constitutive Material Model for Progressive Failure Analysis of Composite Laminates
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Round Timber Bolted Joints with Steel Plates under Static and Cyclic Loading
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A Multiscale Approach to Polycrystalline Materials Damage and Failure
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A Multi-Scale Scheme for Modelling Fracture under Dynamic Loading Conditions
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Estimation of the Crack Behaviour in the Compressive Layer of the Alumina-Zirconia Ceramic Laminate
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 627A Multiscale Approach to Polycrystalline Materials...

A Multiscale Approach to Polycrystalline Materials Damage and Failure

Abstract:

A two-scale three-dimensional approach for degradation and failure in polycrystalline materials is presented. The method involves the component level and the grain scale. The damage-induced softening at the macroscale is modelled employing an initial stress boundary element approach. The microscopic degradation is explicitly modelled associating Representative Volume Elements (RVEs) to relevant points of the macro continuum and employing a cohesive-frictional 3D grain-boundary formulation to simulate intergranular degradation and failure in the Voronoi morphology. Macro-strains are downscaled as RVEs' periodic boundary conditions, while overall macro-stresses are obtained upscaling the micro-stress field via volume averages. The comparison between effective macro-stresses for the damaged and undamaged RVEs allows to define a macroscopic measure of local material degradation. Some attention is devoted to avoiding pathological damage localization at the macro-scale. The multiscale processing algorithm is described and some preliminary results are illustrated.

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Advances in Fracture and Damage Mechanics XIII

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Periodical:

Key Engineering Materials (Volume 627)

Pages:

33-36

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.627.33

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Online since:

September 2014

Authors:

Ivano Benedetti*, Ferri M.H.Aliabadi

Keywords:

Boundary Element Method (BEM), Micromechanics, Multiscale Damage Modelling, Polycrystalline Materials

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