Abstract
The tensile behaviour of unidirectional and [±θ]s angle-ply HMU carbon-fibre-reinforced borosilicate glass was determined as a function of the angle between the fibre and the applied load. Both the longitudinal and transverse strain of the composite are reported and discussed relative to the microstructural features responsible for the observed composite behaviour. Stress-strain behaviour for static and cyclic loading conditions is presented. The experimentally determined values of the composite elastic modulus and strength are also compared with those predicted from classical laminate theory. The composite tensile strength is accurately predicted by the Tsai-Hill failure criterion. The elastic modulus measurements indicate that the shear modulus of the uniaxially reinforced composites is higher than that of the multiaxially reinforced composites. This observation is attributed to more extensive matrix microcracking being present in the multiaxially reinforced composite as a result of fabrication. The failure modes present in the composite are also documented.
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