Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
권호 표지
DOI QR코드

DOI QR Code

The Absorbed Energy of Carbon/Epoxy Composite Laminates Subjected to High-velocity impact in Considering the Loss of Projectile Mass

고속충격을 받는 Carbon/Epoxy 복합재 적층판의 충격체 질량손실을 고려한 흡수에너지 예측

  • 조현준 (충남대학교 항공우주공학과 대학원) ;
  • 김인걸 (충남대학교 항공우주공학과) ;
  • 이석제 (충남대학교 항공우주공학과 대학원) ;
  • 김영아 (충북대학교 토목공학과) ;
  • 우경식 (충북대학교 토목공학과)
  • Received : 2013.06.27
  • Accepted : 2013.12.27
  • Published : 2013.12.31
Download PDF
⟨ Previous Next ⟩

Abstract

In this paper, we conducted high velocity impact test for Carbon/Epoxy composite laminates and proposed advanced method for predicting the absorbed energy of composite laminates. During high-velocity impact test, we discovered loss of projectile mass macroscopically using high speed camera, thus we calculated the absorbed energy of composite laminates by taking loss of projectile mass into account. We proposed a model for predicting the absorbed energy of composite laminates subjected to high-velocity impact, the absorbed energy was classified into static energy and dynamic energy. The static energy was calculated by the quasi-static perforation equation that is related to the fiber breakage and static elastic energy. The dynamic energy can be divided by the kinetic energy of deformed specimen and fragment mass. Finally, the predicted absorbed energy considering loss of projectile mass was compared with experimental results.

본 논문에서는 Carbon/Epoxy 복합재 적층판에 대하여 실사격 실험을 수행하였으며, 복합재 적층판의 흡수에너지를 예측하기 위한 개선된 방법을 제시하였다. 고속충격실험 과정에서 충격체의 질량손실을 고속카메라를 통하여 거시적으로 확인하였으며, 따라서 이를 고려하여 복합재 적층판의 흡수에너지를 계산하였다. 고속충격을 받는 복합재 적층판의 흡수에너지를 예측하기 위한 모델을 제시하였으며, 복합재 적층판의 흡수에너지는 크게 정적에너지와 동적에너지로 분류하였다. 정적에너지 계산은 섬유의 파손과 정적 탄성에너지와 관련 있는 준정적 관통실험식을 통해 구한 관통에너지를 사용하였다. 동적에너지는 변형되는 시편의 운동에너지와 손실된 파편 질량들의 운동에너지로 나뉠 수 있다. 최종적으로 충격체 질량손실을 고려하여 예측된 흡수에너지와 실험결과를 비교/분석하였다.

Keywords

References

  1. Reid, S.R., and Wen, H.M., 2000, Impact behaviour of Fibrereinforced Composite Materials and Structures, CRC Press, pp. 239-273.
  2. Morye, S.S., Hine, P.J., Duckett, R.A., Carr, D.J., and Ward, I.M., "Modelling of the Energy Absorption by Polymer Composites upon Ballistic Impact," Composite science and Technology, Vol. 60, Issue 14, 2000, pp. 2631-2642. https://doi.org/10.1016/S0266-3538(00)00139-1
  3. You, W.Y., A Study on the High Velocity Impact Behavior of Gr/ Ep Composite Laminates Based on uasi-static Perforation Test, MS. Thesis, Chungnam National University, Korea, 2012.
  4. You, W.Y., Lee, S.J., Kim, I.G., and Kim, J.H., "Prediction of the Penetration Energy for Composite Laminates Subjected to High-velocity Impact Using the Static Perforation Test," Journal of the Korean Society for Composite Materials, 2012, pp. 147-153. https://doi.org/10.7234/kscm.2012.25.5.147
  5. Wen, H.M., and Join, N., "Semi-empirical Equations for the Perforation of Plates by Mass," Structure Under Shock and Impact-II, 2000, pp. 369-380.
  6. Sun, C.T., and Potti, S.V., "A Somple Model to Predict Residual Velocities of Thick Composite Laminates Subjected to High Velocity Impact," International Journal of Impact Engineering, Vol. 18, No. 3, 1996, pp. 337-353.
  7. Morye, S.S., Hine, P.J., Duckett, R.A., Carr, D.J., and Ward, I.M., "A Comparison of the Properties of Hot Compacted Gel-spun Polyethylene Fiber Composite with Conventional Gel-spun polyethylene Fiber Composite," Composites Part A : Applied Science and Manufacturing, Vol. 30, Issue 5, 1999, pp. 649-660. https://doi.org/10.1016/S1359-835X(98)00175-4
  8. Gama, B.A., and Gillespie, Jr. J.W., "Punch Shear Based Penetration Model of Ballistic Impact of Thick-section Composite," Composite Structures, Vol. 86, Issue 144, 2008, pp. 356-369. https://doi.org/10.1016/j.compstruct.2007.11.001
  9. Mines, R.A.W., Roach, A.M., and Jones N., "High Velocity Perforation Behaviour of Polymer Composite Laminates," International Journal of Impact Engineering, Vol. 22, Issue 6, 1999, pp. 561-588. https://doi.org/10.1016/S0734-743X(99)00019-6
  10. Nailk, N.K., Shrirao, P., and Reddy, B.C.K., "Ballistic Impact Behaviour of Woven Fabric Composites: Formulation," International Journal of Impact Engineering, Vol. 32, Issue 9, 2006, pp. 1521-1552. https://doi.org/10.1016/j.ijimpeng.2005.01.004