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

Meisam Jalalvand; Mohamad Fotouhi; Michael R. Wisnom

doi:10.1016/j.compscitech.2017.10.011

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

Meisam Jalalvand, Mohamad Fotouhi, Michael R. Wisnom

Mechanical And Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

30 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 language	English
Pages (from-to)	232-240
Number of pages	9
Journal	Composites Science and Technology
Volume	153
Early online date	17 Oct 2017
DOIs	https://doi.org/10.1016/j.compscitech.2017.10.011
Publication status	Published - 1 Dec 2017

Keywords

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

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10.1016/j.compscitech.2017.10.011Licence: CC BY 4.0

Jalalvand-etal-CST-2017-Orientation-dispersed-pseudo-ductile-hybrid-composite-laminatesFinal published version, 2.34 MBLicence: CC BY 4.0

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

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 {\textquoteleft}orientation-dispersed{\textquoteright} 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 {\textquoteleft}orientation-blocked{\textquoteright} 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.",

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