TY - JOUR
T1 - Experimental and numerical study of hybrid (CFRP-GFRP) composite laminates containing circular cut-outs under shear loading
AU - Damghani, Mahdi
AU - Pir, Rakib Ali
AU - Murphy, Adrian
AU - Fotouhi, Mohammad
PY - 2022
Y1 - 2022
N2 - Previous works have established the response and failure behaviour of hybrid (CFRP-GFRP) laminates when subjected to a wide range of destabilising loads. However, to date no works have focused on plates with cut-outs under shear loading and quantified the influence of selective laminate shapes and hybridisation on their post-buckling response. Herein, the plate collapse behaviour of a novel X-braced hybrid (CFRP-GFRP) twill woven laminate containing a large circular cut-out (diameter to width ratio of 0.35), subjected to in-plane shear loading is investigated. The study includes a hybrid and a baseline pure CFRP design and employs both experimental and numerical analysis. The experimental results illustrate that despite having less CFRP material, a hybrid laminate design with shaped CFRP plies exhibits greater failure load (+9%), and a greater failure load to buckling load ratio (1.26 compared to 1.12). However, this comes at the cost of a marginally lower initial plate buckling load (-3%). Additionally, the combined experimental and numerical analysis reveals the detailed failure mechanism of both the pure CFRP and hybrid laminates, demonstrating similar behaviour but that the hybrid design endures significantly more widespread shear damage of the matrix.
AB - Previous works have established the response and failure behaviour of hybrid (CFRP-GFRP) laminates when subjected to a wide range of destabilising loads. However, to date no works have focused on plates with cut-outs under shear loading and quantified the influence of selective laminate shapes and hybridisation on their post-buckling response. Herein, the plate collapse behaviour of a novel X-braced hybrid (CFRP-GFRP) twill woven laminate containing a large circular cut-out (diameter to width ratio of 0.35), subjected to in-plane shear loading is investigated. The study includes a hybrid and a baseline pure CFRP design and employs both experimental and numerical analysis. The experimental results illustrate that despite having less CFRP material, a hybrid laminate design with shaped CFRP plies exhibits greater failure load (+9%), and a greater failure load to buckling load ratio (1.26 compared to 1.12). However, this comes at the cost of a marginally lower initial plate buckling load (-3%). Additionally, the combined experimental and numerical analysis reveals the detailed failure mechanism of both the pure CFRP and hybrid laminates, demonstrating similar behaviour but that the hybrid design endures significantly more widespread shear damage of the matrix.
KW - Cut-out
KW - Hybrid composites
KW - Laminated composites
KW - Nonlinear behaviour
KW - Post-buckling behaviour
KW - Shear buckling
UR - http://www.scopus.com/inward/record.url?scp=85134591108&partnerID=8YFLogxK
U2 - 10.1016/j.tws.2022.109752
DO - 10.1016/j.tws.2022.109752
M3 - Article
AN - SCOPUS:85134591108
SN - 0263-8231
VL - 179
JO - Thin-Walled Structures
JF - Thin-Walled Structures
M1 - 109752
ER -