Abstract
Intralaminar shear properties of four 40-ply unidirectional carbon-fibre reinforced polymer matrix composites were investigated using the Iosipescu shear test. The apparent shear strength and shear moduli were measured using specimens with two different fibre orientations. Finite element analysis was applied to determine the stress distribution within the Iosipescu specimen. The experimental shear moduli when corrected to account for the non-uniform shear stress distribution in the gauge section, were within 8% of micro-mechanics predictions. The failure modes in the two fibre orientations were different, resulting in a change in apparent shear strength.
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