Abstract
New materials, that possess high damping characteristics and high strength properties, have been studied in carbon fiber reinforced plastics (CFRP). These materials are referred to as CFRP/damping-material laminates in this paper. The CFRP/damping-material laminates investigated here are composed of unidirectional carbon/epoxy prepreg sheet and polyethylene based damping material sheet, which is used as an interleaf. Cantilever beam tests revealed the high damping properties of these laminates. Loss factor values for these composites are from 5 to 50 times as large as those for conventional CFRP. These values could be predicted by using an analysis based on a constrained layer treatment for all but two specimen types, which exhibited high damping properties under longitudinal vibration. The interleaving effect on mechanical strength is also presented.
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