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Characterisation of mechanical behaviour and damage analysis of 2D woven composites under bending

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journal contribution
posted on 12.03.2015 by Himayat Ullah, Andy Harland, Vadim Silberschmidt
In this paper, flexural loading of woven carbon fabric-reinforced polymer laminates is studied using a combination of experimental material characterisation, microscopic damage analysis and numerical simulations. Mechanical behaviour of these materials was quantified by carrying out tensile and large-deflection bending tests. A substantial difference was found between the materials' tensile and flexural properties due to a size effect and stress stiffening of thin laminates. A digital image-correlation technique capable of full-field strain-measurement was used to determine in-plane shear properties of the studied materials. Optical microscopy and micro-computed tomography were employed to investigate deformation and damage mechanisms in the specimens fractured in bending. Various damage modes such as matrix cracking, delaminations, tow debonding and fibre fracture were observed in these microstructural studies. A two-dimensional finite-element (FE) model was developed to analyse the onset and propagation of inter-ply delamination and intra-ply fabric fracture as well as their coupling in the fractured specimen. The developed FE model provided a correct prediction of the material's flexural response and successfully simulated the sequence and interaction of damage modes observed experimentally.

History

School

  • Mechanical, Electrical and Manufacturing Engineering

Published in

Composites Part B: Engineering

Volume

75

Pages

156 - 166

Citation

ULLAH, H., HARLAND, A.R., and SILBERSCHMIDT, V.V., 2015. Characterisation of mechanical behaviour and damage analysis of 2D woven composites under bending. Composites Part B: Engineering, 75 pp. 156-166.

Publisher

© Elsevier Ltd

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Publication date

2015

Notes

NOTICE: this is the author’s version of a work that was accepted for publication in Composites Part B: Engineering. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composites Part B: Engineering, Vol. 75 (June 2015). DOI:10.1016/j.compositesb.2015.01.036

ISSN

1359-8368

Other identifier

S1359836815000530

Language

en

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