THE EFFECT OF FIBRE ORIENTATION ON FRACTURE PROPERTIES OF GLASS FIBRE-EPOXY COMPOSITE
Meri Burzić1, Zoran Radaković2, Mersida Manjgo3, Zijah Burzić4
1)University of Belgrade, Innovation Centre of the Faculty of Mech. Engng., Belgrade, Serbia,
2)University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia
3)University of Mostar, Faculty of Mechanical Engineering, Bosnia and Herzegovina
4)Military Technical Institute, Belgrade, Serbia
The effect of glass fibre orientation in an epoxy matrix composite on impact load and fracture toughness is experimentally analysed by testing Charpy V notched specimens, and notched CT specimens. Specimens are produced from samples with glass fibre orientation [±45º]4s, and [0º/90º]4s. Specimens with V notch have been tested on instrumented Charpy machine, enabling to separate energies for crack initiation and crack propagation. The stress intensity factor Kc is selected as the fracture toughness parameter.
Keywords: composite, glass fibres, epoxy resins, fibre orientation, impact testing, stress intensity factor