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

Tools

Jalalvand, Meisam and Fotouhi, Mohamad and Wisnom, Michael R. (2017) Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination. Composites Science and Technology, 153. pp. 232-240. ISSN 0266-3538 (https://doi.org/10.1016/j.compscitech.2017.10.011)

[thumbnail of Jalalvand-etal-CST-2017-Orientation-dispersed-pseudo-ductile-hybrid-composite-laminates]
Preview
 Text. Filename: Jalalvand_etal_CST_2017_Orientation_dispersed_pseudo_ductile_hybrid_composite_laminates.pdf
Final Published Version
License: Creative Commons Attribution 4.0 logo
Download (2MB)| Preview

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.

ORCID iDs

Jalalvand, Meisam ORCID logoORCID: https://orcid.org/0000-0003-4691-6252, Fotouhi, Mohamad and Wisnom, Michael R.;
CORE (COnnecting REpositories)