Abstract
The interlaminar shear strength (ILSS）in CFRP was obtained using a double-notch shear (DNS）test to study the fiber orientation effects. The laminate configuration was 〔－α/＋α/－α/＋α〕s, where α＝0°, 15°, 30°, 45°, 60°, 75°and 90°. A shear-lag analysis was conducted to predict the ILSS as a function of fiber orientation, considering that the thickness of the interlaminar shear layer is a function of fiber orientation α. The ILSS was determined by the maximum shear stress criterion. The dependence of the ILSS on fiber orientation was qualitatively predicted by the shear-lag analysis.
