Avoid catastrophic failure in wind turbine blades: a study of delamination under various loading conditions

Ghasemnejad, Hessammaddin (2011) Avoid catastrophic failure in wind turbine blades: a study of delamination under various loading conditions. Windtech International, ISSN (print) 1574-2415

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Abstract

Wind turbine blades are typically manufactured from fibre-reinforced polymer (FRP) composites, and delamination failure can be an important issue in these structures. In extreme conditions, such as ice impacting, multiple delamination with a triangular shape is found in different parts of a blade. This delamination introduces local damage, which can then cause catastrophic failure under various loading conditions including buckling. Buckling and post-buckling are two loading conditions that can occur in large wind turbine blades due to gravitational, aerodynamic and centrifugal forces. In the work reported here, experimental studies of buckling and post-buckling failure in multi-delaminated composite beams were carried out. Laminated composite beams were pinned through their thickness using natural flax yarns to control delamination failure during the post-buckling process. Multi-delaminated composite beams were manufactured with laminate designs of [C90/G90]4 and [C0/G0]4 and tested to find the critical buckling load and post-buckling failure mode.

Item Type: Article
Research Area: Mechanical, aeronautical and manufacturing engineering
Faculty, School or Research Centre: Faculty of Science, Engineering and Computing > School of Aerospace and Aircraft Engineering
Depositing User: Hessam Ghasemnejad
Date Deposited: 20 Oct 2011 15:07
Last Modified: 20 Oct 2011 15:07
URI: http://eprints.kingston.ac.uk/id/eprint/21008

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