Investigation of thermally induced bistable behaviour for tow-steered laminates

Ajit S. Panesar*, Kalyan Hazra, Paul M. Weaver

*Corresponding author for this work

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

32 Citations (Scopus)

Abstract

Traditionally, bistable laminates have been developed from prepreg plies stacked up together to achieve a layup which is either constant or discretely varying over the planform of the laminate. Laminates with discrete variation in layup are, in particular, of interest as they offer the prospect of easier blending. Moreover, such laminates can be manufactured to have Variable Angle Tows (VATs) in a ply using a tow-steering technique, doing so, ensures fibre-continuity and may impart additional structural strength. This paper presents an approach to develop finite element (FE) models which can accurately predict the cured shape(s) of tow-steered laminates that are designed to be bistable. Manufactured laminates are characterised using microscopy and resin burn-off tests to identify resin-rich layers, ply-thicknesses and fibre volume fractions (V f) - which are then translated into FE models. Presented data highlights the influence of the manufacturing process in the thermally induced bistable behaviour of tow-steered laminates. © 2012 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)926-934
Number of pages9
JournalComposites Part A: Applied Science and Manufacturing
Volume43
Issue number6
DOIs
Publication statusPublished - 1 Jun 2012

Keywords

  • A. Polymer-matrix composites (PMCs)
  • B. Residual stress
  • Bistability
  • C. Finite element analysis (FEA)
  • E. Stitching

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