A Study on the Interlaminar Fracture Toughness of Hybrid Composites

하이브리드 복합재료의 층간파괴인성치에 관한 연구

  • Published : 2004.11.01


This paper describes the effect of loading rate, specimen geometries and material properties for ModeⅠ and Mode Ⅱ interlaminar fracture toughness of hybrid composite by using double cantilever beam (DCB) and end notched flexure (ENF) specimen. In the range of loading rate 0.2~20mm/min, there is found to be no significant effect of loading rate with the value of critical energy release rate (Gc).The value of Gc for variation of initial crack length are nearly similar values when material properties are CF/CF and GF/GF, however, the value of Gc are highest with the increasing intial crack length at CF/GF. The SEM photographs show good fiber distribution and interfacial bonding of hybrid composites when the moulding is the CF/GF.


Loading rate;Hybrid composite;Interlaminar fracture toughness;Initial crack Length;Fracture surface analysis


  1. Bunsell, A. R. and Harris, B.(1974) : 'Hybrid carbon and glass fibre composites', pp. 157-164
  2. Summerscales, J. and Short, D.(1978) : 'Carbon fibre and glass fibre hybrid reinforced plastics. Composites', pp. 157-166
  3. Jang, B. Z., Chen, L. C., Wang, C. Z., Lin, H.T., and Zee, R.H.(1989) :'Impact resistance and energy absorption mechanisms in hybrid composites.' Composites Science and Technology, pp. 305-335
  4. Wang, C. J., Jang, B. Z., Panus, J. and Valaire, B.T.(1991) : 'Impact behavior of hybrid-fibre and hybrid-matrix composites. Journal of Reinforced Plastics and Composites', pp. 356-378
  5. Novak, R. C. and DeCrescente, M. A.(1972) : 'Impact behavior of unidirectional resin matrix composites tested in the fiber direction.' Composite materials: testing and design(Second Conference), ASTM STP 497, pp. 311-323
  6. Chamis, C. C., Hanson, M. P. and Serafini, T. T.(1972) : 'Impact resistance of unidirectional fiber composites.' Composite materials: testing and design Second Conference), ASTM STP 497, pp. 324-349
  7. Hashemi, S., Kinloch, A.J. and Williams, J.G. (1989) : Corrections Needed in Double Contilever Beam Tests for Assessing the Interlaminar Failure of Fiber-Composites', J. Mat. Sci. Letters 8, pp. 125-129
  8. Berry, J. P. (1983) : Determination of Fracture Surface Energies by Cleavage Techanique, J. Appl. Phys., 34, pp. 62-66
  9. Kageyama, K., Kobayashi, T. and Chou, T.W.(1987) : Analytical Compliance Method for Mode I Interlaminar Fracture Toughness Testing of Compsites', Comp. 18, pp. 393-399
  10. 김형진.엄윤성.고성위 (1994) : CFRP 복합재료의 Mode I 충간파괴인성치에 관한 연구, 한국복합재료학회지 7(4), 65-73