Post-buckling failure in multi-delaminated composite wind turbine blade materials

Ghasemnejad, H., Occhineri , L. and Swift-Hook, D.T. (2011) Post-buckling failure in multi-delaminated composite wind turbine blade materials. Materials & Design, 32(10), pp. 5106-5112. ISSN (print) 0264-1275

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Abstract

This study models the inter-laminar damage due to low velocity impacts on hybrid composite materials typical of those used in wind turbine blade structures. The effect of z-pinning using natural flax yarn on the critical buckling load and post-buckling behaviour of multi-delaminated composite beams was investigated. Laminated composite beams were pinned through their thickness using natural flax yarns to control delamination failure during the post-buckling process. A multiple delamination with a triangular shape was inserted into each of the beams to simulate the damage caused by a low velocity impact e.g. ice, on composite wind turbine blades. For a laminate design of [C90/G90]4, global collapse caused no delamination failure during the post-buckling test while delamination failure occurred for a laminate design of [C0/G0]4. In this case, z-pinning can significantly increase the failure resistance within a composite structure and it can then postpone the failure process. The buckling process of a multi-delaminated composite beam was also simulated by finite element software ANSYS and the results were substantially verified by relevant experimental results.

Item Type: Article
Uncontrolled Keywords: plates
Research Area: Mechanical, aeronautical and manufacturing engineering
Faculty, School or Research Centre: Faculty of Science, Engineering and Computing > Materials Research Centre
Depositing User: Hessam Ghasemnejad
Date Deposited: 12 Sep 2011 14:49
Last Modified: 06 Dec 2012 11:36
URI: http://eprints.kingston.ac.uk/id/eprint/20047

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