탄소섬유/에폭시 복합재료의 파괴에너지에 미치는 pH,Strain Rate 및 섬유 부피분율의 영향

이재영; 최형기; 심미자; 김상욱

Journal of the Korean Industrial and Engineering Chemistry, Vol.6, No.3, 446-451, June, 1995

Export Citation

탄소섬유/에폭시 복합재료의 파괴에너지에 미치는 pH,Strain Rate 및 섬유 부피분율의 영향

Effects of pH, Strain Rate and Fiber Volume Fraction on Fracture Energy of Carbon Fiber/Epoxy Composites

이재영, 최형기, 심미자, 김상욱

초록

탄소섬유/에폭시수지 복합재료의 파괴에너지에 미치는 pH, strain rate 및 섬유부피분율의 영향을 연구하였다. PH 2-12 범위에서 strain rate를 2.37×10^-3sec^-1부터 23.67×10^-3sec^-1까지 변과를 시켰으며, 섬유부피분율은 0∼0.09이었다. Three point bending 시험에 의해 시편을 파단시킨 후 섬유의 debond된 길이와 Pull-out된 길이를 ZPM 법에 의해 구하였다. 본 계의 파괴에너지는 주로 pull-out energy가 가장 크게 나타나며, pH 7인 경우가 PH 2, 12인 경우보다 더 큰 값을 나타내었다. 그리고, strain rate 및 섬유부피분율이 증가함에 따라 파괴에너지가 증가하였다.

The effects of pH, strain rate and fiber volume fraction on the fracture energy of carbon fiber/epoxy composites were investigated. The range of strain rate was from 2.37×10^-3 sec^-1 to 23.67×10^-3 sec^-1, that of pH was 2 to 12 and fiber volume fraction was 0 to 0.09. Fracture of the specimen was carried out by three point bending test and fiber debonded length and pull-out length were measured by Zeiss projection microscope. Pull-out energy gave a major contribution to the fracture energy. The fracture energy at pH 7 was larger than those at pH 2 and pH 12. Fracture energy increased with the increase of strain rate and fiber volume fraction.

[References]

Morgan RJ, Mones ET, Steele WJ, Polymer, 23, 295 (1982)
Gu J, Narang SC, Pearce EM, J. Appl. Polym. Sci., 30, 299 (1985)
Moehlenpah AE, Ishai O, Dibenedetto AT, J. Appl. Polym. Sci., 13, 1231 (1969)
Antoon MK, Koenig JL, J. Polym. Sci., 19, 197 (1981)
Ting RY, J. Mater. Sci., 16, 3059 (1981)
Stang H, Shah SP, J. Mater. Sci., 21, 953 (1986)
Harris B, Bunsell AR, Composites, 6, 197 (1975)
Lee JY, Shim MJ, Kim SW, J. Korean Ind. Eng. Chem., 5(4), 737 (1994)
Kirk JN, Munro M, Beaumont PWR, J. Mater. Sci., 13, 2197 (1978)
Browtow W, Corneliussen RD, "Failure of Plastics, 446, Hanser Publishers," Munich-Vienna-New York (1986)
Gershon B, Maron G, J. Mater. Sci., 16, 3059 (1981)
Beaumont PW, Anstice PD, J. Mater. Sci., 15, 2619 (1980)
Dover IR, Smith IO, Chadwick GA, J. Mater. Sci., 10, 1176 (1977)

[1] Morgan RJ, Mones ET, Steele WJ, Polymer, 23, 295 (1982)

[2] Gu J, Narang SC, Pearce EM, J. Appl. Polym. Sci., 30, 299 (1985)

[3] Moehlenpah AE, Ishai O, Dibenedetto AT, J. Appl. Polym. Sci., 13, 1231 (1969)

[4] Antoon MK, Koenig JL, J. Polym. Sci., 19, 197 (1981)

[5] Ting RY, J. Mater. Sci., 16, 3059 (1981)

[6] Stang H, Shah SP, J. Mater. Sci., 21, 953 (1986)

[7] Harris B, Bunsell AR, Composites, 6, 197 (1975)

[8] Lee JY, Shim MJ, Kim SW, J. Korean Ind. Eng. Chem., 5(4), 737 (1994)

[9] Kirk JN, Munro M, Beaumont PWR, J. Mater. Sci., 13, 2197 (1978)

[10] Browtow W, Corneliussen RD, "Failure of Plastics, 446, Hanser Publishers," Munich-Vienna-New York (1986)

[11] Gershon B, Maron G, J. Mater. Sci., 16, 3059 (1981)

[12] Beaumont PW, Anstice PD, J. Mater. Sci., 15, 2619 (1980)

[13] Dover IR, Smith IO, Chadwick GA, J. Mater. Sci., 10, 1176 (1977)