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A Study on the Compressive Properties of Seawater-absorbed Carbon-Epoxy Composites - Hydrostatic Pressure Effect  

Lee Ji Hoon (경희대학교 대학원 기계공학과)
Rhee Kyong Yop (경희대학교 테크노공학대학)
Kim Hyun ju (한국해양연구원)
Publication Information
Journal of Korean Society of Coastal and Ocean Engineers / v.16, no.4, 2004 , pp. 191-195 More about this Journal
Abstract
This study investigated the effect of deep-sea environment on the compressive characteristics of polymer matrix composite. The specimens used in the experiment were thick Carbon-Epoxy composites that were made from Carbon-Epoxy prepregs. The specimens were immersed into seawater for thirteen months. The seawater content at saturation was about 1.2% of the specimen weight. The hydrostatic pressures applied were 0.1 MPa, 100 MPa, 200 MPa, and 270 MPa. It was found that the compressive elastic modulus increased about 10% as the hydrostatic pressure increased from 0.1 MPa to 200 MPa. The modulus increased additional 2.3％ as the pressure increased to 270 MPa. It was also found that compressive fracture strength and compressive fracture strain increased with pressure in a linear behavior. Compressive fracture strength increased 28％ and compressive fracture strain increased 8.5％ as the hydrostatic pressure increased from 0.1 MPa to 270 MPa.
Keywords
hydrostatic pressure; carbon-epoxy composite; compressive elastic modulus; compressive fracture strength; compressive fracture strain;
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