Abstract
Uniaxial carbon fibre-reinforced laminates were prepared from epoxy resins containing dissolved polyethersulphone. Fracture surfaces showed nodular inclusions about 0.8 μm in diameter in the resin matrix when dicyandiamide was used as the curing agent, whereas there were no visible morphological features in resins cured with diaminodiphenylsulphone. Work to fracture and fatigue properties of the laminates were shown to be relatively insensitive to these differences in morphology. An acoustic resonance method for monitoring fatigue damage in CFRP is illustrated.
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