EFFECTS OF WATER IMMERSION ON THE WATER UPTAKE AND SHEAR STRENGTH OF PULTRUDED CARBON FIBER REINFORCED EPOXY RODS

Abstract

Abstract: In the present article, pultruded carbon fiber reinforced epoxy rods were immersed in distilled water at 20℃ and 60℃, and the water uptake and the variation of the shear strength were investigated. As found, increasing in the immersion temperatures leads to the higher coefficient of water diffusion. The coefficient of the water diffusion along the fibers is higher than that transverse to the fibers. After seven days of immersion, the shear strength of the rods shows remarkable reduction. Further extension of the immersion time brings in a slight increase in the shear strength at 20℃, but a slow decrease at 60℃. Compared to the rods prepared with Toray-T300 carbon fibers, the rods with carbon fibers from one Chinese company possesses higher shear strength, but exhibits to be more susceptible to the water immersion.

Key words: carbon fiber reinforced polymer composites, hygrothermal ageing, coefficient of diffusion, shear strength

CLC Number:

TB332

HAO Xin-kai, HUANG Sheng-de, ZHANG Hong-wei, XIAN Gui-jun. EFFECTS OF WATER IMMERSION ON THE WATER UPTAKE AND SHEAR STRENGTH OF PULTRUDED CARBON FIBER REINFORCED EPOXY RODS[J]. COMPOSITES SCIENCE AND ENGINEERING, 2014, 0(12): 68-73.

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