Hydro-mechanical network modelling of particulate composites

Athanasiadis, I., Wheeler, S. J. and Grassl, P. (2018) Hydro-mechanical network modelling of particulate composites. International Journal of Solids and Structures, 130-31, pp. 49-60. (doi:10.1016/j.ijsolstr.2017.10.017)

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Abstract

Differential shrinkage in particulate quasi-brittle materials causes microcracking which reduces durability in these materials by increasing their mass transport properties. A hydro-mechanical three-dimensional periodic network approach was used to investigate the influence of particle and specimen size on the specimen permeability. The particulate quasi-brittle materials studied here consist of stiff elastic particles, and a softer matrix and interfacial transition zones between matrix and particles exhibiting nonlinear material responses. An incrementally applied uniform eigenstrain, along with a damage-plasticity constitutive model, are used to describe the shrinkage and cracking processes of the matrix and interfacial transition zones. The results showed that increasing particle diameter at constant volume fraction increases the crack widths and, therefore, permeability, which confirms previously obtained 2D modelling results. Furthermore, it was demonstrated that specimen thickness has, in comparison to the influence of particle size, a small influence on permeability increase due to microcracking.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Athanasiadis, Dr Ignatios and Grassl, Dr Peter and Wheeler, Professor Simon
Authors: Athanasiadis, I., Wheeler, S. J., and Grassl, P.
College/School:College of Science and Engineering > School of Engineering > Infrastructure and Environment
Journal Name:International Journal of Solids and Structures
Publisher:Elsevier
ISSN:0020-7683
ISSN (Online):1879-2146
Published Online:25 October 2017
Copyright Holders:Copyright © 2017 The Authors
First Published:First published in International Journal of Solids and Structures 130-131:49-60
Publisher Policy:Reproduced under a Creative Commons License
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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
566601SAFE - a Systems Approach For Engineered BarriersPeter GrasslEngineering and Physical Sciences Research Council (EPSRC)EP/I036427/1ENG - ENGINEERING INFRASTRUCTURE & ENVIR