Orientation-dispersed pseudo-ductile hybrid composite laminates – A new lay-up concept to avoid free-edge delamination

Meisam Jalalvand*, Mohamad Fotouhi, Michael R. Wisnom

*Corresponding author for this work

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

33 Citations (Scopus)
409 Downloads (Pure)

Abstract

Multi-Directional hybrid composites can suffer from free-edge delamination, a damage mode that doesn't exist in Uni-Directional hybrid composites and can hinder the pseudo-ductility that can be achieved with thin-ply hybrids. This paper presents a new lay-up concept called ‘orientation-dispersed’ laminates to avoid this mode of damage in quasi-isotropic hybrids. It is shown that the energy release rates at the free-edges of orientation-dispersed layups are significantly lower than those in ‘orientation-blocked’ laminates. Finally, the experimental results from two quasi-isotropic layups with π/3 and π/4 intervals are presented showing a good pseudo-ductility with no free-edge delamination.
Original languageEnglish
Pages (from-to)232-240
Number of pages9
JournalComposites Science and Technology
Volume153
Early online date17 Oct 2017
DOIs
Publication statusPublished - 1 Dec 2017

Keywords

  • Hybrid composites
  • Fragmentation
  • Non-linear behaviour
  • Stress/strain curves
  • Finite Element Analysis (FEA)

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  • HiPerDuCT - Programme Grant - Full Proposal

    Bond, I. P. (Co-Principal Investigator), Etches, J. A. (Researcher), McAlpine, H. C. (Manager), Potter, K. D. (Co-Principal Investigator), Weaver, P. M. (Co-Principal Investigator), Bismarck, A. (Co-Principal Investigator), Shaffer, M. (Co-Principal Investigator) & Wisnom, M. R. (Principal Investigator)

    1/07/1130/06/18

    Project: Research

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