Pure and simple: investigating the in-plane shear kinematics of a quasi-unidirectional glass fiber non-crimp fabric using the bias-extension test

Christian Krogh*, Jørgen A. Kepler, Johnny Jakobsen

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

This paper concerns shear testing of a quasi-unidirectional non-crimp fabric used for wind turbine blades. In this context “quasi” refers to the fact that the majority of the reinforcement is oriented along the longitudinal direction with a small amount acting as a stabilizing backing layer in the ± 80∘ direction. The bias-extension test is used to investigate the in-plane shear kinematics of the fabric, i.e. whether a pure or simple shear kinematic is more suitable. Further, an expected outcome of the test is a maximum applicable shear angle. Such information is highly important when simulating the draping of the fabrics in a blade mold. The investigation shows that the fabric deforms mostly in pure shear for the shear angles relevant for wind turbine blade production.

Original languageEnglish
JournalInternational Journal of Material Forming
Volume14
Issue number6
Pages (from-to)1483-1495
Number of pages13
ISSN1960-6206
DOIs
Publication statusPublished - Nov 2021

Bibliographical note

Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer-Verlag France SAS, part of Springer Nature.

Keywords

  • Non-crimp fabric
  • Quasi-unidirectional
  • Shear testing

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