낙하 충격 시험에 의한 저밀도 2-D 탄소/탄소 복합재의 충격파괴거동

주혁종; 손종석; Hyeok-Jong JooC; Jong-Seok Son

Polymer(Korea), Vol.26, No.2, 270-278, March, 2002

Export Citation

낙하 충격 시험에 의한 저밀도 2-D 탄소/탄소 복합재의 충격파괴거동

The Impact Fracture Behaviors of Low Density 2-D Carbon/Carbon Composites by Drop Weight Impact Test

주혁종^†, 손종석¹

충남대학교 고분자공학과
¹LG화학 산업재연구소

Hyeok-Jong JooC^†, and Jong-Seok Son¹

Department of Polymer Science and Engineering, Chungnam National University, Taejon 305-764, Korea
¹Industrial Material Research Institute, LG Chemical Ltd, Cheongju 361-721, Korea

E-mail:

초록

저밀도 2-D 탄소/탄소 복합재료의 저속 충격에 의한 파괴 거동과 첨가제에 따른 충격 에너지 흡수 경향을 연구하였다. 저속 충격시험은 mini tower 낙추 충격 시험기를 이용하였으며, 흑연, 카본블랙, 분쇄탄소섬유를 첨가제로 선택하였다. 흑연의 첨가는 최대하중값을 증가시켰으며, 전체적인 관통이 일어나기까지 응력을 오랫동안 유지시키는 효과를 나타내었다. 특히 9 vol%의 함량에서 흑연이 첨가되지 않은 시편보다 약 42%의 충격 흡수 개선을 보였다. 약 0.4 J의 낮은 충격에너지에 의한 충격 회수에 따른 실험에서 첨가제가 첨가되지 않은 시편의 경우, 충격에너지는 층간분리에 의해 소모되고, 흑연의 함량이 증가함에 따라 파괴 경향은 시편의 관통으로 변화함을 관찰할 수 있었다.

In this study, the fracture behavior by low velocity impact damage and the tendencies of impact energy absorption were investigated. Low velocity impact tests were performed using a mini tower drop weight impact tester, and graphite powder, carbon black and milled carbon fiber were chosen as additives. Addition of graphite powder increased the maximum load and maintained the stress long until the total penetration happened. At the content of 9 vol%, they showed the maximum of 42% improvement in impact strength compared composites containing no additives. At the test with low impact energy of 0.4 J, impact energy was consumed by delamination in the composite containing no additives, however, as graphite contents increased, the tendency of failure changed to the penetration of the specimen.

Keywords:carbon/carbon composites;low velocity Impact test;impact energy;delamination;penetration

[References]

Lim SK, Luck Polymer Tech., 2, 71 (1987)
Saimders DEJ, Soutis C, Kinsey A, Composities, 26, 661 (1995)
Prevorsek DC, Chin HB, Bhatnagar A, Compos. Structures, 23, 137 (1993)
Yurgartis SW, Macgibbon BS, Mulvaney P, J. Mater. Sci., 27, 6679 (1992)
Hong DH, Luck Polymer Tech., 5, 40 (1988)
Lee SY, 3rd Conference on National Defes Materials C-102 (2000)
Maikuma H, Gillespie JW, Wilkins DJ, Compos. Mater., 24, 124 (1990)
Jun EJ, Compos. Mater., 26, 2247 (1992)
Mcquillen EJ, Gause LW, Compos. Mater., 10, 79 (1976)
Ma CC, Tai NH, Wu GY, Lin SH, Lin JM, Ong CL, Chang YC, Sheu MF, ANTEC '96 Preceeding, 917 (1996)
Zhou G, Compos. Structures., 31, 185 (1995)
Kim BJ, Choo MJ, Kang TJ, J. Korea Compos. Mater., 4, 1 (1991)
Son JS, Chung KH, Joo HJ, Polym.(Korea), 24(6), 845 (2000)
Choi IH, Choi YR, Hong CS, J. Korea Compos. Mater., 6, 69 (1993)

[Referenced By]

[1] Lim SK, Luck Polymer Tech., 2, 71 (1987)

[2] Saimders DEJ, Soutis C, Kinsey A, Composities, 26, 661 (1995)

[3] Prevorsek DC, Chin HB, Bhatnagar A, Compos. Structures, 23, 137 (1993)

[4] Yurgartis SW, Macgibbon BS, Mulvaney P, J. Mater. Sci., 27, 6679 (1992)

[5] Hong DH, Luck Polymer Tech., 5, 40 (1988)

[6] Lee SY, 3rd Conference on National Defes Materials C-102 (2000)

[7] Maikuma H, Gillespie JW, Wilkins DJ, Compos. Mater., 24, 124 (1990)

[8] Jun EJ, Compos. Mater., 26, 2247 (1992)

[9] Mcquillen EJ, Gause LW, Compos. Mater., 10, 79 (1976)

[10] Ma CC, Tai NH, Wu GY, Lin SH, Lin JM, Ong CL, Chang YC, Sheu MF, ANTEC '96 Preceeding, 917 (1996)

[11] Zhou G, Compos. Structures., 31, 185 (1995)

[12] Kim BJ, Choo MJ, Kang TJ, J. Korea Compos. Mater., 4, 1 (1991)

[13] Son JS, Chung KH, Joo HJ, Polym.(Korea), 24(6), 845 (2000)

[14] Choi IH, Choi YR, Hong CS, J. Korea Compos. Mater., 6, 69 (1993)