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

Meisam Jalalvand, Mohamad Fotouhi, Michael R. Wisnom

Research output: Contribution to journalArticle

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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
Early online date17 Oct 2017
Publication statusPublished - 1 Dec 2017



  • finite element analysis (FEA)
  • fragmentation
  • hybrid composites
  • non-linear behaviour
  • stress/strain curves

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