Abstract

Degradation behaviors of filament-winded composites have been evaluated under the accelerated environmental test of high temperature, water immersion and thermal impact conditions. Two kinds of laminated composites coated by an urethane resin have been used: carbon-fiber reinforced epoxy(T700/Epon-826, CFRP) and glass-fiber reinforced phenolic (E-glass/phenolic, GFRP). For tensile strength of $0^{\circ}$ composites, CFRP showed little degradation while GFRP did high reduction by 25% under the influence of high temperature and water However for water-immersed $90^{\circ}$ composites tensile strength of both CFRP and GFRP showed high reduction. Bending strength and modulus of $90^{\circ}$ composites were largely reduced in water-immersion as well as high temperature environment. Urethane coating on the composite surface improved the bending properties by 20%, however hardly showed such improvement for water-immersed $90^{\circ}$ composites. In case of shear strength and modulus, both CFRP and GFRP showed high reduction by water-Immersion test but did a slight increase by high temperature and thermal impact conditions.

Keywords

Laminated Composites;Water Immersion;Thermal Impact;Degradation;Tensile Strength;Bending

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References

1. Hwang, T.G., Jung, H.J., Jung, S.G., Jung, B., Kang, B.Y. and Kim, J.S., 1995, 'Standardization of Process/Test and Evaluation of Composite Pressure Vessels,' Proc. of the 4th Korean Society for Propulsion Engineering, pp. 11-19
2. Choi, Y.G., Jung, K.D. and Kim, J.K., 1995, 'Structural Stability of Propulsion Body as Application of Fire Spreading Composite Shell,' Proc. of the 4th Korean Society for Propulsion Engineering, pp. 3-8
3. Park, M.G., Ryu, B.N. and Choi, Y.B., 1997, 'Humidity Permeability of T800/AD6005 CompositeMaterials,' Proc. of the 9th Korean Society for Propulsion Engineering, pp. 35-36
4. MIL-STD-810F, 2000, Department of Defense Test Method Standard for Environmental Engineering Considerations and Laboratory Tests
5. Yoon, Y.B., Cho, S.W. and Ha, S.G., 2002, 'Optimal Design of CNG Filament Winding Composite Pressure Vessels,' Transactions of the Korean Society of Mechanical Engineers, Vol. 26, No. 1, pp. 23-30 https://doi.org/10.3795/KSME-A.2002.26.1.023
6. 'Standard Test Method for Tensile Properties of Polymer Matrix Composite Material,' ASTM Standards, Standard D3039/D3039M-95
7. 'Standard Test Method for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials,' ASTM Standards, Standard D790-92
8. 'Standard Test Method for Shear Properties of Composite Materials by the V-Notched Beam Method,' ASTM Standards, Standard D5379/D5379-93
9. Curtin, W.A., 2000, 'Stochastic Damage Evolution and Failure in Fiber-Reinforced Composites,' Advances in Applied Mechanics, Vol. 36, pp. 163-253 https://doi.org/10.1016/S0065-2156(08)70186-8
10. Hull, D., 1981, 'An Introduction to Composite Materials,' Cambridge University Press, Cambridge, pp. 125-154
11. Geier, M.H., 1994, 'Quality Handbook for Composite Materials,' Chapman & Hall, pp. 131-167
12. Springer, G. S. (Ed), 1988 'Enviromental Effects on Composite Materials Vol. 3,' Technomic Publishing Co. Ltd, Lancaster
13. Tang, J.M. and Springer, G.S., 1988, 'Effects of Moisture and Temperature on the Compressive and Short Beam Shear Properties of Fiberite T300/976 Fabric,' Journal of Reinforced Plastics and Composites, Vol. 7, pp. 120-134 https://doi.org/10.1177/073168448800700202
14. Curtin, W.A., 2000, 'Tensile Strength of Fiber Reinforced Composites,' Journal of Composite Materials, Vol. 34, No. 15, pp.1301-1332 https://doi.org/10.1177/002199830003401503

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