DOI QR코드

DOI QR Code

면내 및 면외 하중 조건들에 따른 이종 복합 소재를 가진 경사진 이중외팔보에서의 접착계면의 파괴 특성 연구

A Study on Fracture Property of Adhesive Interface at Tapered Double Cantilever Beam with Inhomogeneous Composite Material due to Loading Conditions of In-plane and Out-plane

  • Lee, Jung-Ho (Kongju National University, Graduate School, Department of Mechanical Engineering) ;
  • Kim, Jae-Won (Kongju National University, Graduate School, Department of Mechanical Engineering) ;
  • Cheon, Seong-Sik (Kongju National University, Division of Mechanical & Automotive Engineering) ;
  • Cho, Jae-Ung (Kongju National University, Division of Mechanical & Automotive Engineering)
  • 투고 : 2020.11.12
  • 심사 : 2020.12.20
  • 발행 : 2020.12.31

초록

공학 및 산업 분야에서는 구조적인 부분들에서 경량 복합 소재가 강과 같은 금속 소재를 대체해 오고 있다. 이러한 복합 소재는 리벳, 용접이나 볼트 및 너트를 이용한 체결 방법을 대신하여 접착제 체결 방법을 적용하고 있다. 복합 소재에 접착제 체결 방법을 적용하기 위해서는 접착계면에 대한 강도 특성 연구가 필수적으로 요구된다. 섬유 강화 플라스틱 복합 소재인 CFRP를 용이하게 가공하여 본 연구를 수행하였다. CFRP와 알루미늄(Al6061), 알루미늄 폼(Al-foam)을 가진 이종 복합 소재로 된 경사진 이중외팔보(TDCB) 시험편들로서 면내 전단과 면외 전단의 하중 조건들하에서 정적 실험을 수행하였다. 본 연구 결과를 통하여 이중외팔보들의 파괴 특성과 그 파단 시점을 파악하여 접착계면을 가진 이종 복합 소재 구조물에 관한 내구성을 검토하였다.

At the engineering and industrial areas, the lightweight composite material has been substituted with the metals, such as steel at the structural parts. This composite material has been applied by the adhesive bonding method, as well as the joint methods with rivets, welds or bolts and nuts. The study on the strength characteristics of adhesive interface is necessarily required in order to apply the method to composite materials. CFRP specimens as the fiber reinforced plastic composites were manufactured easily and this study was carried out. The static experiments were performed under the loading conditions of in-plane and out-plane shears with the inhomogeneous composite TDCB specimens with CFRP, aluminum (Al6061), and aluminum foam (Al-foam). Through the result of this study, the durability on the inhomogeneous composite structure with adhesive interface was investigated by examining the fracture characteristic and the point in time.

키워드

참고문헌

  1. Park, J.W., Cheon, S.S., and Cho, J.W., "A Study on Fracture Behavior of Center Crack at Unidirectional CFRP due to Stacking Angle", The Journal of the Korean Society for Composite Materials, Vol. 29, No. 6, 2016, pp. 342-346.
  2. Park, S.O., "Fatigue Crack Growth Properties of Epoxy Adhesives under Mode I Loading", Journal of Korean Society of Mechanical Technology, Vol.16 No. 1, 2014, pp. 1055-1062. https://doi.org/10.17958/ksmt.16.1.201402.1055
  3. Blackman, B.R.K., Hadavinia, H., Kinloch, A.J., Paraschi, M., and Williams, J.G., "The Calculation of Adhesive Fracture Energies in Mode I: Revisiting the Tapered Double Cantilever Beam (TDCB) Test", Engineering Fracture Mechanics, Vol. 70, No. 2, 2003, pp. 233-248. https://doi.org/10.1016/S0013-7944(02)00031-0
  4. Lee, J.H., Cho, J.U., and Cheon, S.S., "An Investigation on the Behavior of Fracture Mechanics as the Type of Mode I at Specimen Bonded with Tapered Carbon Fiber Reinforced Plastic", The Journal of the Korean Society for Composite Materials, Vol. 29, No. 2, 2016, pp. 85-89.
  5. Lee, J.H., Cho, J.U., Cheon, S.S., and Kook, J.H., "Fracture Behaviour Analysis of the Crack at the Specimen with the Type of Mode I Composed of the Bonded Carbon Fiber Reinforced Plastic", The Journal of the Korean Society for Composite Materials, Vol. 28, No. 6, 2015, pp. 356-360.
  6. Lee, J.H., Cho, J.U., Cheon, S.S., and Kook, J.H., "A Fracture Study on the Bonded DCB Specimen of the Mode III Type with Aluminum Foam", The Journal of the Korean Society for Composite Materials, Vol. 28, No. 4, 2015, pp. 191-196.
  7. Lee, J.H., Choi, H.K. Kim, S.S., Cho, J.U., Zhao, G., Cho, C., and Hui, D., "A Study on Fatigue Fracture at Double and Tapered Cantilever Beam Specimens Bonded with Aluminum Foams", Composites Part B: Engineering, Vol. 103, 2016, pp. 139-145. https://doi.org/10.1016/j.compositesb.2016.08.012
  8. Park, J.W., A Characteristic Study on the Safety of CFRP Light Material and the Fracture of Adhesive Interface at In-plane and Out-plane Shears, Master Thesis, Kongju National University, Korea, 2019.
  9. Cho, H.K., "Optimization of Joint Hole Position Design for Composite Beam Clamping", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 18, 2019, pp. 14-21.
  10. Hwang, G.W., A Study on the Fracture Behaviour of Bonded Interface at CFRP DCB Composite of Modes I and II Applied with Laminar Angle, Master Thesis, Kongju National University, Korea, 2018.
  11. Kim, G.H., "Prototype Product Based on the Functional Test of ANG Fuel Vessel Applied to Composite Carbon Fiber", Journal of the Korean Society of Manufacturing Process Engineers, Vol. 18, 2019, pp. 7-13.
  12. Sun, H.P., and Cho, J.U., "Fatigue Analysis and Experimental Verification at Tapered Double Cantilever Beam(TDCB) Model of Aluminum Foam", Journal of the Korean Society of Mechanical Technology, Vol. 16, No. 6, 2014, pp. 2009-2014. https://doi.org/10.17958/ksmt.16.6.201412.2009
  13. Determination of the Mode I Adhesive Fracture Energy GIC of Structure Adhesives Using the Double Cantilever Beam (DCB) and Tapered Double Cantilever Beam (TDCB) Specimens, British Standard, BS 7991, Imperial College of Science and Technology (JISC), pp. 3-13, 2001.
  14. ISO 11343, International Standards Organization, Geneva, Switzerland 1993.