Quantification of flexural fatigue life and 3D damage in carbon fibre reinforced polymer laminates

Liu, Z., Li, P. , Srikanth, N., Liu, T. and Chai, G. B. (2016) Quantification of flexural fatigue life and 3D damage in carbon fibre reinforced polymer laminates. Composites Part A: Applied Science and Manufacturing, 90, pp. 778-785. (doi: 10.1016/j.compositesa.2016.09.008)

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Carbon fibre reinforced polymer (CFRP) laminated composites have become attractive in the application of wind turbine blade structures. The cyclic load in the blades necessitates the investigation on the flexural fatigue behaviour of CFRP laminates. In this study, the flexural fatigue life of the [+45/−45/0]2s CFRP laminates was determined and then analysed statistically. X-ray microtomography was conducted to quantitatively characterise the 3D fatigue damage. It was found that the fatigue life data can be well represented by the two-parameter Weibull distribution; the life can be reliably predicted as a function of applied deflections by the combined Weibull and Sigmodal models. The delamination at the interfaces in the 1st ply group is the major failure mode for the flexural fatigue damage in the CFRP laminate. The calculated delamination area is larger at the interfaces adjacent to the 0 ply. The delamination propagation mechanism is primarily matrix/fibre debonding and secondarily matrix cracking.

Item Type:Articles
Additional Information:This work was financially supported by the Ministry of Defence Singapore – Nanyang Technological University (NTU) Joint Applied R&D Cooperation (JPP) Programme (Grant No.: MINDEF-NTUJPP/12/01/02).
Glasgow Author(s) Enlighten ID:Li, Dr Peifeng
Authors: Liu, Z., Li, P., Srikanth, N., Liu, T., and Chai, G. B.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Composites Part A: Applied Science and Manufacturing
ISSN (Online):1878-5840
Published Online:09 September 2016
Copyright Holders:Copyright © 2016 Elsevier Ltd.
First Published:First published in Composites Part A: Applied Science and Manufacturing 90: 778-785
Publisher Policy:Reproduced in accordance with the publisher copyright policy

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