Exploration of the potential for pseudo-ductility in thin ply CFRP angle-ply laminates via an analytical method

J. D. Fuller*, M. R. Wisnom

*Corresponding author for this work

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

45 Citations (Scopus)

Abstract

Thin ply laminates have shown much promise in recent times in terms of their exciting damage suppression characteristics. Utilisation of this damage suppression in carbon-epoxy angle-ply laminates has been shown experimentally to yield a highly non-linear stress-strain response. This paper presents an analytical modelling method that incorporates matrix plasticity and reorientation of the fibres into a classical laminate analysis for the prediction of the in-plane response of thin ply angle-ply laminates. It is shown that the method can successfully predict the non-linear behaviour of [±θ5]s laminates with values of θ between 15° and 45°. The main characteristics of the stress-strain curve, such as the initial largely linear region, yield point and stiffening before final failure, are all well captured. The modelling has allowed straightforward identification of a particular fibre angle that exhibits strength in excess of 900. MPa, strain to failure of more than 3.5% and a promising pseudo-ductile strain of 1.2%.

Original languageEnglish
Article numberCSTE6056
Pages (from-to)8-15
Number of pages8
JournalComposites Science and Technology
Volume112
Early online date10 Mar 2015
DOIs
Publication statusPublished - 1 May 2015

Keywords

  • A. Laminate
  • B. Non-linear behaviour
  • B. Plastic deformation
  • C. Laminate theory
  • C. Modelling

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