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A homogenization-based damage model for stiffness loss in ductile metal-matrix composites(Article)

Type
Articles dans des revues avec comité de lecture
Author
DORHMI, Khaoula
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
MORIN, LEO
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
DERRIEN, Katell
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
HADJEM-HAMOUCHE, Zehoua
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]
CHEVALIER, Jean - Pierre
86289 Laboratoire Procédés et Ingénierie en Mécanique et Matériaux [PIMM]

URI
http://hdl.handle.net/10985/18376
DOI
10.1016/j.jmps.2019.103812
Date
2020
Journal
Journal of the Mechanics and Physics of Solids

Abstract

The aim of this paper is to develop a homogenized model that permits to describe the progressive loss of stiffness observed experimentally on ductile metal-matrix composites subjected to mechanical loadings. A two-step homogenization procedure is proposed to describe the effect of damage on the elastic properties. Since damage is solely driven by plastic deformation, a Gurson-type model is considered to describe the nucleation and growth of voids. Completed by appropriate evolution equations of the microstructure, this model of plasticity is used to update the elastic properties that are described by a mean-field homogenization scheme. The complete incremental model is implemented numerically and applied to the prediction of the stiffness loss. The model predictions are in very good agreement with experimental results on Al-SiC composites, cast irons and steel composites.

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