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

3 Citations

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.

Language	English
Pages	232-240
Number of pages	9
Journal	Composites Science and Technology
Volume	153
Early online date	17 Oct 2017
DOIs	10.1016/j.compscitech.2017.10.011
State	Published - 1 Dec 2017

Fingerprint

Delamination

Laminates

Ductility

Energy release rate

Composite materials

Keywords

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

Cite this

Jalalvand, M., Fotouhi, M., & Wisnom, M. R. (2017). Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination. Composites Science and Technology, 153, 232-240. DOI: 10.1016/j.compscitech.2017.10.011

Jalalvand, Meisam ; Fotouhi, Mohamad ; Wisnom, Michael R./ Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination. In: Composites Science and Technology. 2017 ; Vol. 153. pp. 232-240

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Jalalvand, M, Fotouhi, M & Wisnom, MR 2017, 'Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination' Composites Science and Technology, vol. 153, pp. 232-240. 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. / Jalalvand, Meisam; Fotouhi, Mohamad; Wisnom, Michael R.

In: Composites Science and Technology, Vol. 153, 01.12.2017, p. 232-240.

Research output: Contribution to journal › Article

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AB - 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.

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