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Experimental characterisation of parameters controlling the compressive failure of pultruded unidirectional carbon fibre composites

Experimental characterisation of parameters controlling the compressive failure of pultruded unidirectional carbon fibre composites
Experimental characterisation of parameters controlling the compressive failure of pultruded unidirectional carbon fibre composites
The classical kink-band formation models predict that the compressive strength of UD carbon fibre reinforced composite materials (UD CFRP) is governed by fibre misalignment as well as of the mechanical shear properties. A new image analysis procedure for experimental determination of the fibre misalignment, the Fourier transform misalignment analysis (FTMA), has been developed. Moreover, a modified asymmetric Iosipescu test specimen geometry has been developed and validated for accurate measurement of the composite material shear properties
without parasitic effects due to axial splitting. In the test procedure the shear strain distribution is measured using Digital Image Correlation (DIC) and the results calibrated based on FEA modelling results. Using the measured properties as input, the predictions of the classic compressive strength models have been compared with measured compressive strengths. Finally, an alternative approach to the classical kink band equilibrium has been proposed and demonstrated to provide more accurate predictions than the classical models
ud cfrp, pultrusion, compressive failure, kinkband formation models, fourier transform misalignment anaylsis, ftma, digital image correlation, div, modified iosopescu test
978-0-87849-248-0
1660-9336
15-22
Trans Tech
Thomsen, O.T.
f3e60b22-a09f-4d58-90da-d58e37d68047
Kratmann, K.K.
0ad834aa-3770-42d9-8b9a-2f00b5ad5fa7
Mines, R.A.W.
Dulieu-Barton, J.M.
Thomsen, O.T.
f3e60b22-a09f-4d58-90da-d58e37d68047
Kratmann, K.K.
0ad834aa-3770-42d9-8b9a-2f00b5ad5fa7
Mines, R.A.W.
Dulieu-Barton, J.M.

Thomsen, O.T. and Kratmann, K.K. (2010) Experimental characterisation of parameters controlling the compressive failure of pultruded unidirectional carbon fibre composites. In, Mines, R.A.W. and Dulieu-Barton, J.M. (eds.) Advances in Experimental Mechanics VII. (Applied Mechanics and Materials, , (doi:10.4028/www.scientific.net/AMM.24-25.15), 24-25) Zurich, Switzerland. Trans Tech, pp. 15-22. (doi:10.4028/www.scientific.net/AMM.24-25.15).

Record type: Book Section

Abstract

The classical kink-band formation models predict that the compressive strength of UD carbon fibre reinforced composite materials (UD CFRP) is governed by fibre misalignment as well as of the mechanical shear properties. A new image analysis procedure for experimental determination of the fibre misalignment, the Fourier transform misalignment analysis (FTMA), has been developed. Moreover, a modified asymmetric Iosipescu test specimen geometry has been developed and validated for accurate measurement of the composite material shear properties
without parasitic effects due to axial splitting. In the test procedure the shear strain distribution is measured using Digital Image Correlation (DIC) and the results calibrated based on FEA modelling results. Using the measured properties as input, the predictions of the classic compressive strength models have been compared with measured compressive strengths. Finally, an alternative approach to the classical kink band equilibrium has been proposed and demonstrated to provide more accurate predictions than the classical models

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More information

Published date: June 2010
Keywords: ud cfrp, pultrusion, compressive failure, kinkband formation models, fourier transform misalignment anaylsis, ftma, digital image correlation, div, modified iosopescu test
Organisations: Faculty of Engineering and the Environment

Identifiers

Local EPrints ID: 339103
URI: http://eprints.soton.ac.uk/id/eprint/339103
ISBN: 978-0-87849-248-0
ISSN: 1660-9336
PURE UUID: d9b4e294-10a1-43b9-8c69-7e02a23848e8

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Date deposited: 23 May 2012 10:59
Last modified: 20 Dec 2018 17:31

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Contributors

Author: O.T. Thomsen
Author: K.K. Kratmann
Editor: R.A.W. Mines
Editor: J.M. Dulieu-Barton

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