Fatigue of Hybrid Composites
A study has been carried out of the fatigue behaviour of hybrid composites of carbon/Kevlar-49 and carbon/glass in epoxy resin. For these two families of materials a comparison is presented of the properties of unidirectional composites and laminates with a [(±45,02)2]s structure. The unidirectional composites have been tested in repeated tension and tension/compression at R ratios between +0.1 and −1.2. All other materials have been tested in repeated tension fatigue only (R = +0.1). The results have been analyzed by normalizing relative to the elastic modulus and to the ordinary tensile strength, revealing a homogeneous pattern of behaviour for both families of hybrids.
KeywordsFatigue Behaviour Hybrid Composite Aramid Fibre Unidirectional Composite Fatigue Response
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