A Study on the Surface Treatment of Prepreg with $Ar^+$ Ion to Increase Mode I Fracture Characteristics of Fiber-Reinforced Composites

섬유강화 적층복합재의 열림모드 파괴특성 향상을 위해 $Ar^+$ 이온도움반응법을 적용한 프리프레그의 표면처리 연구

  • Published : 2000.11.01


In this work, the effect of surface treatment of prepreg on the mode I fracture behavior was studied. Unidirectional (0-deg) double cantilever beam (DCB) specimens were used for fracture tests. Two groups of DCB specimens were made: the first group was made of prepregs surface-treated by Ar(sup)+ ion beam under oxygen environment and the second group was made of regular prepregs. For both groups, fracture resistance curve (R-curve) was determined and compared to each other, Results showed that resistance behavior of the first group is better than that of the second group. That is, mode I fracture toughness, G(sub)Ic of the first group is 24% larger than that of the second group. SEM examination shows that the improvement of G(sub)Ic is due to the increase of interfacial strength between plies.


  1. O'Brien, T.K. and Martin, R.H., 1993 'Round Robin Testing for Mode I Interlaminar Fracture Toughness of Composite Materials,' J of Composites Technology and Research, Vol. 15, pp. 269-281
  2. Chou, I., Kimpara, I., Kageyama, K. and Ohsawa, I., 1995, 'Mode I and Mode II Fracture Toughness Measured between Differently Oriented Plies in Graphite/Epoxy Composites,' ASTM STP 1230, pp. 132-151
  3. 이택순, 최영근, 1995, '탄소섬유/에폭시 복합재료의 Mode I 층간파괴거동에 미치는 섬유배향각의 영향에 대한 연구,' 대한기계학회논문집, 제19권, pp. 391-401
  4. 최낙삼, Kinloch, A.J., 1998, '모드 I 하중 조건하에 있는 다방향 적충 복합재료의 층간파괴거동,' 대한기계학회논문집 A 제22권 제3호, pp. 611-623
  5. Chai, H., 1984, 'The Characterization of Mode I Delamination Failure in Nonwoven, Multidirectional Laminates,' Composites, Vol. 15, pp. 277-290
  6. Mall, S., Yun, K.T. and Kochhar, N.K., 1989, 'Characterization of Matrix Toughness Effect on Cyclic Delamination Growth in Graphite Fiber Composites,' ASTM STP 1012, pp. 296-310
  7. Srivastava, V.K. and Harris, B, 1994, 'Effect of Particles on Interlaminar Crack Growth in Cross-Plied Carbon-Fiber/Epoxy Laminates,' J of Material Science, Vol. 29, pp. 548-553
  8. Woo, E.M. and Mao, K.L., 1996, 'Evaluation of Interlarninar-Toughened Poly(Etherimide)-Modified Epoxy/Carbon Fiber Composites,' Polymer Composites, Vol. 17, pp. 799~805
  9. Itoi, M and Yamada, Y., 1992, 'Effect of Surface Treatment of Pitch-Based Carbon Fiber on Mechanical Properties of Polyethemitrile Composites,' Polymer Composites, Vol. 13, pp. 15-29
  10. Tang, L.G. and Kardos, J.L., 1997, 'A Review of Methods for Improving the Interfacial Adhesion Between Carbon Fiber and Polymer Matrix,' Polymer Composites, Vol. 18, pp. 100-113
  11. Choi, W.K. Koh, S.K. and Jung, H.J., 1996, 'Surface Chemical Reactuon Between Polycarbonate and Kilo-electron- Volt Energy $Ar^+$ Ion in Oxygen Environment,' Journal of Vacuum Science & Technology A, Vol. 14, pp. 2366-2371
  12. ASTM D5528-94a, 'Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites,' ASTM Standards, Vol. 14.02, pp. 280-288
  13. Choi, S.C., Park, Y.K., Choi, W.K., 1998, 'Thin Film Growth and Surface Modification by keV Ion Beam,' Japan J of Applied Physics, Vol. 37, pp. 6984-6990