A Study on the Energy Absorption Characteristics and Fracture Mode of CFRP Laminate Members under Axial Compression

축압축을 받는 CFRP 적층부재의 에너지흡수특성과 파괴모드에 관한 연구

  • 김정호 ;
  • 정회범 ;
  • 전형주
  • Published : 2002.09.01


The object of this paper is to investigate collapse characteristics of CF/Epoxy(Carbon Fiber/Epoxy resin) composite tubes on the change of interlaminar number and fiber orientation angle of outer and to evaluate reappearance of collapse characteristics on the change of tension strength of fibers under static and impact axial compression loads. When a CF/Epoxy composite tube is mushed, static/impact energy is consumed by friction between the loading plate and the splayed fiends of the tube, by fracture of the fibers, matrix and their interface. In general, CF/Epoxy tube with 6 interlaminar number(C-type) absorbed more energy than other tubes(A, B, D-types). The maximum collapse load seemed to increase as the interlaminar number of such tubes increases. The collapse mode depended upon orientation angle of outer of CF/Epoxy tubes and loading status(static/impact). Typical collapse modes of CF/Epoxy tubes are wedge collapse mode, splaying collapse mode and fragmentation collapse mode. The wedge collapse mode was shorn in case of CF/Epoxy tubes with 0$^{\circ}$ orientation angle of outer under static and impact loadings. The splaying collapse mode was shown in only case of CF/Epoxy tubes with 90$^{\circ}$ orientation angie or outer under static loadings, however in impact tests those were collapsed in fragmentation mode. So that CF/Epoxy tube with 6 interlaminar number and 90$^{\circ}$ outer orientation angle presented to the optimal collapse characteristics.


CF/Epoxy;composite tube;collapse characteristics;interlaminar number;fiber orientation angle of outer;wedge collapse mode;splaying collapse mode;fragmentation collapse mode


  1. G. L. Farley, 'Relationship Between Mechamcal-Property and Energy-Absorption Trends for Com-posite Tubes,' NASA Technical Paper, 0MB No. 0704-0188, 1992
  2. 김영남, 김지훈, 양인영, '경량화용 복합재 튜브의 적층구성이 흡수에너지특성에 미치는 영향,' 한국정밀공학회 논문집, Vol. 18, No. 11, pp. 34-41, 2001
  3. Y. N. Kim, K. H. Im, J. W. Paik and I. Y. Yang'Experimental Approach on the Collapse Mecha-nism of CFRP Composite Tubes,' Reviews of Progress in QNDE, pp. 369-376, 2000
  4. K. H. Im, Y. N. Kim, J. W. Park, J. K. Sim and I. Y. Yang, 'Energy Absorption Characteristics of CFRP Composite Tubes,' Proceedings of the 4th International Symposium on Impact Engineering, pp. 875-880, 2001
  5. 김정호, 양인영, '충돌시 최적 흡수에너지특성을 갖는 경량화 차체구조용 CFRP 부재의 개발,' 대한기계학회 논문집, Vol. 22, No. 7, pp.1316-1325, 1998
  6. 김영남,차천석, 양인영, '차체구조용 복합재 박육부재의 축압괴특성에 관한 연구,' 자동차공학회 논문집, Vol. 9, No. 6, pp. 195-200, 2001
  7. W. H. Tao, R. E. Robertson and P. H. Thomton, 'Effects of Material Properties and Crush Condi-tions on the Crush Energy Absorption of Fiber Composite Rods,' Composites Science and Tech-nology, Vol. 47, pp. 405-418, 1993 https://doi.org/10.1016/0266-3538(93)90009-6
  8. G. L. Farley, R. M. Jones, 'Crushing Charac-teristics of Composite Tubes with 'Near-Elliptical' Cross Sections,' Journal of Composite Materials, Vol. 26, No. 12, pp. 1741-1751, 1992 https://doi.org/10.1177/002199839202601203
  9. D. R. Ambur, J. H. Starnes, 'Effect of Curvature on the Impact Damage Characteristics and Resi-dual Strength of Composite Plates,' Presented at the 39th AIAA Structures, No. 98-1881, 1998
  10. G. Zhou, G. A. 0. Davies, 'Impact Response of Thick Glass Fibre Reinforced Polyester Lami-nates,' Int. J. Impact Engineering, Vol. 16, No. 3, pp. 357-374, 1995 https://doi.org/10.1016/0734-743X(94)00047-Z
  11. P. H. Thomton, 'The Crush Behavior of Pultruded Tubes at High Strain Rates,' J. Composite Materials, Vol. 24, pp. 594-615, 1990 https://doi.org/10.1177/002199839002400602
  12. G. L. Farley, R. M. Jones 'Crushing Charac-teristics of Continuous Fiber Reinforced Compo-site Tubes,' Journal of Composite Materials, Vol. 26, No. 1, pp. 37-50, 1992 https://doi.org/10.1177/002199839202600103
  13. A. H. Fairfull and D. Hull, 'Energy Absorption of Polymer Matrix Composite Structures: Frictional Effects,' Introduction of Structural Failure. Edtd. by T. Werzbicki and N. Jones, New York: Wiley,PP. 255-279, 1989
  14. Jack R. Vinson. 'The Behavior of Shells Composed of Isotropic and Composite Materials,' Kluwer Academic Publishers, ISBN 0-7923-2113-8, 1993
  15. D. Hull, 'A Unified Approach to Progressive Crushing of Fiber-Reinforced Composite Tubes,' Composites Science and Technology, Vol. 40, No. 3, pp. 377-421, 1991 https://doi.org/10.1016/0266-3538(91)90031-J
  16. 김선규, 심재기, 양인영, '충돌에 의한 차체 박육구조부재의 에너지 흡수특성에 관한 연구,' 한국자동차공학회 논문집, Vol. 3, No. 5, pp.74-81, 1995
  17. G. L. Farley, R. M. Jones, 'Analogy of the EfFect of Materials and Geometrical Variables on Energy-Absorption Capability of Composite Tubes,' Journal of Composite Materials, Vol. 26, No. 1, pp. 78-89, 1992 https://doi.org/10.1177/002199839202600105