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.


Graphite/Epoxy Composites;DCB Specimen;Resistan Curve;Delamination;Fracture Toughness;Compliance Calibration Method


  1. ASTM D5528-94a, 'Mode I Interlaminar Fracture Toughness of Unidirectional Fiber-Reinforced Polymer Matrix Composites,' ASTM Standards, Vol. 14.02, pp. 280-288
  2. 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
  3. 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
  4. 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
  5. 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
  6. 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
  7. Chai, H., 1984, 'The Characterization of Mode I Delamination Failure in Nonwoven, Multidirectional Laminates,' Composites, Vol. 15, pp. 277-290
  8. 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
  9. 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
  10. 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
  11. 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
  12. 이택순, 최영근, 1995, '탄소섬유/에폭시 복합재료의 Mode I 층간파괴거동에 미치는 섬유배향각의 영향에 대한 연구,' 대한기계학회논문집, 제19권, pp. 391-401
  13. 최낙삼, Kinloch, A.J., 1998, '모드 I 하중 조건하에 있는 다방향 적충 복합재료의 층간파괴거동,' 대한기계학회논문집 A 제22권 제3호, pp. 611-623