The Proceedings of the Materials and Mechanics Conference
Online ISSN : 2424-2845
2012
Session ID : GS46
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GS46 Effect of Water Absorption and Freezing on Mode I Interlaminar Fracture Toughness of CFRP
Yuta SHIMIZUHideaki KATOGIKenichi TAKEMURA
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Abstract
In this study, effects of water absorption and freezing on mode I interlaminar fracture toughness of CFRP were investigated. Water absorption test was conducted at 90℃ for 24, 100, 250 and 500 hours. After water absorption, the specimens were kept in the -15℃ environment for 24 hours. Static three-point bending and double cantilever beam (DCB) tests were conducted after water absorption and freezing. As a result, the water absorption rate at 500 hour was 1.5%. Bending strength and mode I interlaminar fracture toughness G_<IC> were decreased with increasing water absorption time. Bending modulus of CFRP did not change after water absorption and freezing. And bending strength and mode I interlaminar fracture toughness G_<IC> in frozen CFRP were lower than that of water absorbed CFRP. These result implied that interfacial adhesion of CFRP was decreased by water absorption.
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© 2012 The Japan Society of Mechanical Engineers
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