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HomeKey Engineering MaterialsKey Engineering Materials Vol. 665A Micro-Mechanical Model for Grain-Boundary...

A Micro-Mechanical Model for Grain-Boundary Cavitation in Polycrystalline Materials

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Abstract:

In this work, the grain-boundary cavitation in polycrystalline aggregates is investigated by means of a grain-scale model. Polycrystalline aggregates are generated using Voronoi tessellations, which have been extensively shown to retain the statistical features of real microstructures. Nucleation, thickening and sliding of cavities at grain boundaries are represented by specific cohesive laws embodying the damage parameters, whose time evolution equations are coupled to the mechanical model. The formulation is presented within the framework of a grain-boundary formulation, which only requires the discretization of the grain surfaces. Some numerical tests are presented to demonstrate the feasibility of the method.

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Advances in Fracture and Damage Mechanics XIV

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Periodical:

Key Engineering Materials (Volume 665)

Pages:

65-68

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.665.65

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Online since:

September 2015

Authors:

Vincenzo Gulizzi*, Alberto Milazzo, Ivano Benedetti

Keywords:

Boundary Elements, Creep, Grain Boundary Cavitation, Micromechanics, Polycrystalline Materials

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© 2016 Trans Tech Publications Ltd. All Rights Reserved

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