TITLE:
To Improve Mixed-Mode Interlaminar Fracture Toughness of Composite Sub-Structures
AUTHORS:
Hessam Ghasemnejad, Hossein Mirzaii
KEYWORDS:
Delamination; Stitching; ADCB; Composite
JOURNAL NAME:
Open Journal of Composite Materials,
Vol.4 No.1,
January
15,
2014
ABSTRACT: The present paper investigates the
influence of stitching on delamination resistance of laminated composite
structures. The mixed-mode interlaminar fracture toughness, GI/IIC, of the stitched hybrid laminated composites is studied
in order to investigate the resistance of the 3D-composites to the crack
propagation in delaminated composite structures. To that end, the mixed-mode
interlaminar fracture toughness was measured using the asymmetric double cantilever
beam (ADCB) test method. The hybrid ADCB and stitched hybrid ADCB composite
beams were laid-up in order to study the effect of stitching on the
interlaminar fracture toughness. The test results showed that the resistance of
stitched fibres against the crack propagation in stitched hybrid composites can
significantly improve the mixed-mode interlaminar fracture toughness.