TY - JOUR
T1 - Orientation-dispersed pseudo-ductile hybrid composite laminates – a new lay-up concept to avoid free-edge delamination
AU - Jalalvand, Meisam
AU - Fotouhi, Mohamad
AU - Wisnom, Michael R.
PY - 2017/12/1
Y1 - 2017/12/1
N2 - 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.
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.
KW - finite element analysis (FEA)
KW - fragmentation
KW - hybrid composites
KW - non-linear behaviour
KW - stress/strain curves
UR - http://www.scopus.com/inward/record.url?scp=85033500577&partnerID=8YFLogxK
U2 - 10.1016/j.compscitech.2017.10.011
DO - 10.1016/j.compscitech.2017.10.011
M3 - Article
AN - SCOPUS:85033500577
VL - 153
SP - 232
EP - 240
JO - Composites Science and Technology
JF - Composites Science and Technology
SN - 0266-3538
ER -