두 섬유 Fragmentatior 시험법에 의한 탄소섬유/에폭시 복합재료의 내구성에 관한 연구

문창권; 문상현; 서차수; 조현혹

Polymer(Korea), Vol.20, No.1, 116-125, January, 1996

Export Citation

두 섬유 Fragmentatior 시험법에 의한 탄소섬유/에폭시 복합재료의 내구성에 관한 연구

Study on the Durability of Carbon Fiber/Epoxy Composite by Two Fiber Fragmentation Test

문창권, 문상현, 서차수, 조현혹

초록

탄소섬유/에폭시 복합재료에서 계면전단강도의 수분에 대한 내구성을 조사하기 위해 두섬유 fragmentation 시험법을 사용하였다. Dogbone형의 두섬유 fragmentation 시험편을 제작하여 75℃의 증류수에 60일까지 침지시켜 수분 흡수량을 측정하였으며, 수분 흡수량에 따른 계면특성 및 계면전단강도를 평가하였다. 그 결과, 침지시간의 경과에 따라 시험편에 흡수된 수분량은 증가하였고, 이러한 수분 흡수량의 증가는 섬유와 수지의 계면을 열화시켜 파단된 섬유길이의 임계 aspect ratio (임계섬유장/섬유직경)를 증가시켰으며, 이것은 곧 수분흡수량의 증가에 의해 복합재료에서 계면전단강도의 감소를 나타내는 것이다.

Two fiber fragmentation technique was used to investigate the influence of hydrothermal on the interfacial shear strength in the carbon fiber/epoxy system. The uptake of water (wt%) and interfacial shear strength were evaluated up to 60 days of immersion time in distilled water at 75℃ using two fiber fragmentation test specimens of dogbone shape. As a result, it was found that moisture absorption of two fiber doggone specimens increased with time of exposure to hydrothermal. This induced to increase the average critical aspect ratio (L_c/D_f) of the fiber fragments. The increase of L_c/D_f for hydrothermally treated samples indicated the decrease of the interfacial shear strength by increasing of moisture absorption.

Keywords:hydrothermal;fragmentation test;interfacial shear strength;durability;degradation

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[2] Lowe GB, Lee TCP, Int. J. Adhes. Adhes., 14, 85 (1994)

[3] Wagner HD, Lustiger A, Composites, 25, 613 (1994)

[4] Gaur U, Miller B, Polym. Compos., 11, 4 (1990)

[5] Miller B, Muri P, Combust. Sci. Technol., 28, 17 (1987)

[6] Gaur U, Miller B, Combust. Sci. Technol., 34, 35 (1989)

[7] Moon CK, J. Appl. Polym. Sci., 44, 561 (1992)

[8] Moon CK, J. Appl. Polym. Sci., 45, 443 (1992)

[9] Moon CK, J. Appl. Polym. Sci., 54(1), 73 (1994)

[10] Takaku A, Arridge RGG, J. Phys. D.: Appl. Phys., 6, 2038 (1973)

[11] Bowling J, Groves GW, J. Mater. Sci., 14, 431 (1979)

[12] Favre J, Merienne MC, Int. J. Adhes. Adhes., 1, 311 (1981)

[13] Penn LS, Lee SM, Fiber Sci. Technol., 17, 91 (1982)

[14] Outwater JO, Murphy MC, Modern Plast., 47, 16 (1970)

[15] Drzal LT, Rich MJ, J. Adhes., 16, 1 (1982)

[16] Drzal LT, SAMPE J., 7 (1983)

[17] Bascom WD, Jensen RM, J. Adhes., 19, 219 (1986)

[18] Curtin WA, J. Mater. Sci., 26, 5239 (1991)

[19] Waterbury MC, Drzal LT, J. Comp. Tech. Res., 13, 22 (1991)

[20] Baxevanakis C, Combust. Sci. Technol., 48, 47 (1993)

[21] Netravali AN, Combust. Sci. Technol., 35, 13 (1989)

[22] Netravali AN, Polym. Compos., 10, 4 (1989)

[23] Mandell JF, Int. J. Adhes. Adhes., 5, 40 (1980)

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[25] Kelly A, Tyson WR, J. Mech. Phys. Solids, 13, 329 (1965)

[26] Miwa M, Osawa T, J. Appl. Polym. Sci., 25, 795 (1980)

[27] Wagner HD, Eitan A, Appl. Phys. Lett., 56, 1965 (1990)

[28] Yavin B, Wagner HD, Polym. Compos., 12, 436 (1991)

[29] Wagner HD, Wood JR, Adv. Compos. Lett., 2, 173 (1993)

[30] Shioya M, Proceeding of the Adhesion Society, 248 (1994)

[31] Weibull W, J. Appl. Mech., 18, 293 (1951)

[32] Asloun EM, J. Mater. Sci., 24, 3504 (1989)

[33] Schutte CL, Composites, 25, 7 (1994)