Abstract
In this study the effect of water absorption on interlaminar shear strength (ILSS) of carbon fiber reinforced epoxy composites (CFRC) and micro or nano sized Al 2 O 3 particle dispersed carbon fiber hybrid reinforced composites (CFHRC) was investigated. Different weight change profiles were observed depending on experimental temperature and water absorption time. A clear drop of interlaminar shear strength was confirmed due to epoxy materials degradation, crack development at fiber matrix interfaces by thermal mismatches of matrix and fiber and/or plasticization of the epoxy matrix. The degree of water absorption of CFRC was controlled by incorporation of nano or micron-sized Al 2 O 3 filler into the epoxy matrix. The effects of Al 2 O 3 filler dispersion on water absorption and ILSS were also correlated.
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