Volume 10, Issue 4, 2001

Interlaminar Tensile Strength Of Carbon Fibre-Epoxy –Specimen Size, Layup And Manufacturing Effects

M. R. Wisnom, M. I. Jones and G. F. J. Hill

University of Bristol, Department of Aerospace Engineering, University Walk, Bristol BS8 1TR.

(Received 1/01; accepted 7/01)

ABSTRACT

Curved beam bending tests have been carried out to measure interlaminar tensile strength of HTA/913 carbon fibre-epoxy. Scaled tests on high quality unidirectional specimens showed a size effect with a 20% reduction in strength for a factor of 4 increase in specimen dimensions. Specimens with (0/±45) layup gave similar strengths to unidirectional ones. A reduction of at least 21% was found for specimens failing in areas where manufacturing quality was not so high.

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