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Authors Lauke, B.
Title Effect of particle size distribution on fracture toughness of polymer composites considering plastic void growth after particle debonding
Date 04.09.2015
Number 41985
Abstract Fracture toughness of particle reinforced polymers is affected by the size distribution of particles. Dissipation mechanisms, such as particle debonding, matrix shear bands or plastic voiding, maybe responsible for this behaviour. It was examined whether matrix voiding energy after particle debonding from the matrix depends on particle size distribution. The stress field solution of the mechanical problem of a spherical particle within a spherical elastic/perfectly plastic matrix under hydrostatic tensile stress was used. After particle debonding, the yielding energy of the matrix shell around a single micro- or nano-particle was calculated. Applying a general model for the calculation of toughness together with an assumed particle size distribution function allowed the examination of the influence of parameters of the size distribution functions. The fracture toughness increases with increasing mean particle diameter and is highest for composites with wide particle size distribution functions, i.e. with larger standard deviations. (C) 2015 Elsevier Ltd. All rights reserved.
Publisher Mechanics Research Communications
Wikidata
Citation Mechanics Research Communications 66 (2015) 1-6
DOI https://doi.org/10.1016/j.mechrescom.2015.02.002
Tags particle-reinforcement fracture toughness analytical modelling crack resistance energy silica epoxy

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