Abstract
The shear behaviour of a new generation composite sandwich structure made up of glass fibre reinforced polymer skins and modified phenolic core material was investigated in view of using this composite material as a shear loading component in structural glue-laminated beams. Characterisation of the shear strength and stiffness of the fibre composite skins and the modified phenolic core material was conducted following the ASTM-D5379/D5379M-93 test standard. The shear behaviour of the individual and the glue-laminated composite sandwiches was investigated under asymmetrical beam shear test. The results of the experimental investigation showed that the asymmetrical beam shear test gives a good estimation of the shear strength and stiffness of the glue-laminated composite sandwiches. A theoretical prediction of the shear strength of the composite sandwich beams with high strength core material was proposed and comparison with experimental results showed a good correlation. The results of the study suggest the high possibility of using composite sandwich construction in the development of structural laminated beams to carry shear.
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