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Damage accumulation in a carbon/epoxy composite: comparison between a multiscale model and computed tomography experimental results

Record type: Article

High-resolution computed tomography has been carried out for carbon/epoxy laminates loaded in situ to failure. The experimental data allows major damage mechanisms to be quantified in 3D, in an unambiguous and mechanically representative way, where previous experimental analysis is limited.

A multi-scale model that predicts damage accumulation in tensile loaded composites is compared to the experimental analysis, to validate the underpinning assumptions within the model and overall performance. The model considers the random nature of fibre-strengths, stress transfer resulting from fibre breaks, fibre/matrix debonding and viscosity of the matrix. Assumptions within the model are made to reduce computational times whilst considering the microscopic behaviour of the whole structure.

Both model and experimental results indicate failure of the composite progresses via single fibre breaks, which, at higher loads, evolve into clusters of broken fibres. The model resulted in reasonable predictions of the preceding damage accumulation and final failure load of the structure.

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Citation

Scott, A.E., Sinclair, I. and Spearing, S.M. et al. (2012) Damage accumulation in a carbon/epoxy composite: comparison between a multiscale model and computed tomography experimental results Composites Part A: Applied Science and Manufacturing, 43, (9), pp. 1514-1522. (doi:10.1016/j.compositesa.2012.03.011).

More information

e-pub ahead of print date: 30 March 2012
Published date: September 2012
Keywords: A. polymer-matrix composites (PMCs), B. fracture, B. stress transfer, computed tomography
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 342060
URI: http://eprints.soton.ac.uk/id/eprint/342060
ISSN: 1359-835X
PURE UUID: 6fafc563-8d78-4e51-b75c-fa82f8e21439

Catalogue record

Date deposited: 10 Aug 2012 14:40
Last modified: 18 Jul 2017 05:31

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Contributors

Author: A.E. Scott
Author: I. Sinclair
Author: S.M. Spearing
Author: A. Thionnet
Author: A. Bunsell

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