Effect of Fiber Weight Fraction on the Fracture Toughness of Long Glass-Fiber Reinforced Polypropylene Composites

긴 유리섬유강화 Polypropylene 복합재료의 섬유 중량비에 따른 파괴인성 변화

This study concerns with the effect of fiber weight fraction on the fracture toughness of long glass-fiber reinforced polypropylene composites. Fracture tests were conducted using compact tension (CT) specimens made of glass fiber polypropylene composites. Three fiber weight fractions of 20%, 30%, and 40% were used. Fracture toughness was determined from the compliance method. Results showed that compliance decreased with increasing fiber weight fraction while critical load increased with fiber weight fraction. Averaged fracture toughness increased 14% as fiber weight fraction increased from 20% to 40%.