THE EFFECT OF FIBRE ORIENTATION ON FRACTURE PROPERTIES OF GLASS FIBRE- EPOXY COMPOSITE UTICAJ ORIJENTACIJE VLAKNA NA KARAKTERISTIKE LOMA KOMPOZITA TIPA
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 454s, and 0/904s. 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. Ključne reči • kompozit • staklena vlakna • epoksi smola • orijentacija vlakna • ispitivanje udarom • faktor intenziteta napona