A numerical study of the influence of microvoids in the transverse mechanical response of unidirectional composites

Ashouri Vajari, Danial and González Martínez, Carlos Daniel and Llorca Martinez, Francisco Javier and Legarth, Brian Nyvang (2014). A numerical study of the influence of microvoids in the transverse mechanical response of unidirectional composites. "Composites Science and Technology", v. 97 ; pp. 46-54. ISSN 0266-3538. https://doi.org/10.1016/j.compscitech.2014.04.004.

Description

Title: A numerical study of the influence of microvoids in the transverse mechanical response of unidirectional composites
Author/s:
  • Ashouri Vajari, Danial
  • González Martínez, Carlos Daniel
  • Llorca Martinez, Francisco Javier
  • Legarth, Brian Nyvang
Item Type: Article
Título de Revista/Publicación: Composites Science and Technology
Date: 16 June 2014
ISSN: 0266-3538
Volume: 97
Subjects:
Freetext Keywords: Computational mechanics; Polymer–matrix composites (PMCs); Porosity/Voids; Failure criterion
Faculty: E.T.S.I. Caminos, Canales y Puertos (UPM)
Department: Ciencia de los Materiales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The effect of porosity on the transverse mechanical properties of unidirectional fiber-reinforced composites is studied by means of computational micromechanics. The composite behavior is simulated by the finite element analysis of a representative volume element of the composite microstructure in which the random distribution of fibers and the voids are explicitly included. Two types of voids – interfiber voids and matrix voids – were included in the microstructure and the actual damage mechanisms in the composite, namely matrix and interface failure, were accounted for. It was found that porosity (in the range 1–5%) led to a large reduction in the transverse strength and the influence of both types of voids in the onset and propagation of damage throughout the microstructure was studied under transverse tension and compression. Finally, the failure locus of the composite lamina under transverse tension/compression and out-of-plane shear was obtained by means of computational micromechanics and compared with the predictions of Puck’s model and with experimental data available in the literature. The results show that the strength of composites is significantly reduced by the presence of voids

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2012-37552UnspecifiedUnspecifiedUnspecified

More information

Item ID: 35464
DC Identifier: http://oa.upm.es/35464/
OAI Identifier: oai:oa.upm.es:35464
DOI: 10.1016/j.compscitech.2014.04.004
Official URL: http://www.sciencedirect.com/science/article/pii/S0266353814001109
Deposited by: Memoria Investigacion
Deposited on: 03 Jun 2015 18:04
Last Modified: 16 May 2019 09:57
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