Identifying optimal rotating pitch angles in composites with Bouligand structure

Wenting Ouyang, Bowen Gong, Huan Wang*, Fabrizio L Scarpa, Bo Su, Hua-Xin Peng*

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

Abstract

We present a theoretical analysis to relate the rotation pitch angle to the mechanical performance (interlaminar shear property in this case) of laminas mimicking the Bouligand architecture. For a given laminate, there exists an optimal pitch angle which yields the lowest shear stress. Theoretical models are compared against experimental tests carried out on 32-layer helicoidal carbon fibre laminates with pitch angles of 6°, 9.1°, 12°, 25.7° where the 9.1° is the predicted optimal angle. The results show that this particular architecture with a pitch angle of 9.1° indeed attains the highest load-bearing capability and delays any catastrophic delamination. This provides a fundamental basis to the design of helicoidal structures mimicking the Bouligand architecture.
Original languageEnglish
Article number100602
Number of pages5
JournalComposites Communications
Volume23
Early online date26 Dec 2020
DOIs
Publication statusPublished - 1 Feb 2021

Keywords

  • Bouligand structure
  • Composites
  • Helicoidal laminates
  • Interlaminar shear

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