Composites Research

  • 제30권4호
  • /
  • Pages.241-246
  • /
  • 2017
  • /
  • 2288-2103(pISSN)
  • /
  • 2288-2111(eISSN)
한국복합재료학회 (The Korean Society for Composite Materials)
권호 표지
DOI QR코드

DOI QR Code

열처리된 Pine/탄소섬유 복합재료의 기계적 및 계면물성 향상을 위한 최적 조건

Optimum Conditions for Improvement of Mechanical and Interfacial Properties of Thermal Treated Pine/CFRP Composites

  • Shin, Pyeong-Su (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Kim, Jong-Hyun (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Park, Ha-Seung (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Baek, Yeong-Min (Department of Materials Engineering and Convergence Technology, Center for Creative Human Resource & Convergence Materials, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Kwon, Dong-Jun (Department of Materials Engineering and Convergence Technology, Research Institute for Green Energy Convergence Technology, Gyeongsang National University) ;
  • Park, Joung-Man (Department of Materials Engineering and Convergence Technology, Research Institute for Green Energy Convergence Technology, Gyeongsang National University)
  • Received : 2017.05.10
  • Accepted : 2017.08.30
  • Published : 2017.08.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

Abstract

취성을 가진 섬유강화플라스틱은 충격을 받을 때 충격에너지를 흡수하면서 섬유와 기지재 간 계면에서 탈착 및 박리가 일어난다. 이는 복합재료의 에너지 충격흡수정도의 지표로 삼을 수 있다. 복합재료의 취성을 해결하기 위해 pine과 복합재료의 접착에 대한 연구가 되어 지고 있다. 이번 연구에서는 열처리 된 pine이 탄소섬유강화복합재료와 에폭시 접착제를 이용하여 접착되었다. 최적의 열처리 조건을 확인하기 위해, pine을 160도 및 200도 조건하에 열처리를 하였다. Pine 및 pine/탄소섬유복합재료의 기계적 및 계면물성을 파악하기 위해 인장, 인장중첩전단 및 아이조드 실험을 하였다. 또한, 열처리에 따른 나뭇결간의 결합력을 확인하기 위해 나뭇결 수직방향으로 인장시편 제조 후 파단될 때 탄성파를 음향방출시스템을 이용하여 분석하였다. 160도 조건으로 열처리 했을 때 나무강화 효과로 기계, 계면 및 나뭇결간의 결합력이 좋은 것을 확인하였다. 그러나 과한 열을 주게 되면 열에 약한 헤미셀룰로오스가 분해되면서 잡아주는 인자가 줄어들어 물성이 감소하였다.

The brittle nature in most FRP composites is accompanying other forms of energy absorption mechanisms such as fibre-matrix interface debonding and ply delamination. It could play an important role on the energy absorption capability of composite structures. To solve the brittle nature, the adhesion between pines and composites was studied. Thermal treated pines were attached on carbon fiber reinforced polymer (CFRP) by epoxy adhesives. To find the optimum condition of thermal treatment for pine, two different thermal treatments at 160 and $200^{\circ}C$ were compared to the neat case. To evaluate mechanical and interfacial properties of pines and pine/CFRP composites, tensile, lap shear and Izod test were carried out. The bonding force of pine grains was measured by tensile test at transverse direction and the elastic wave from fracture of pines was analyzed. The mechanical, interfacial properties and bonding force at $160^{\circ}C$ treated pine were highest due to the reinforced effect of pine. However, excessive thermal treatment resulted in the degradation of hemicellulose and leads to the deterioration in mechanical and interfacial properties.

Keywords

References

  1. Dunlop, J.W.C., and Fratzl P., "Multilevel Architectures in Natural Materials," Scripta Materialia, Vol. 68, 2013, pp. 8-12. https://doi.org/10.1016/j.scriptamat.2012.05.045
  2. Nadir, Y., Nagarajan, P., Ameen, M., and Arif M.M., "Flexural Stiffness and Strength Enhancement of Horizontally Glued Laminated Pine Beams With GFRP and CFRP Composite Sheets," Construction and Building Materials, Vol. 1112, 2016, pp. 547-555.
  3. Song, Y.J., Jung, H.J., Lee, I.H., and Hong, S.I., "Performance Evaluation of Bending Strength of Curved Composite Glulams Made of Korean White Pine," Journal of Korean Wood Science and Technology, Vol. 43, No. 4, 2015, pp. 463-469. https://doi.org/10.5658/WOOD.2015.43.4.463
  4. Park, J.C., Shin, Y.J., Hong, S.I., "Bonding Performance of Glulam Reinforced with Glass Fiber Reinforced Plastics," Journal of the Korean Wood Science and Technology, Vol. 37, No. 4, 2009, pp. 357-363.
  5. Raftery, G.M., and Harte, A.M., "Low-Grade Glued Laminated Timber Reinforced with FRP Plate," Composites: Part B: Engineering, Vol. 42, 2011, pp. 724-735. https://doi.org/10.1016/j.compositesb.2011.01.029
  6. Haj, A.R., and Elhajjar, R., "An Infrared Thermoelastic Stress Analysis Investigation of Single Lap Shear Joints in Continuous and Woven Carbon/Fiber Epoxy Composites," International Journal of Adhesion & Adhesives, Vol. 48, 2014, pp. 210-216. https://doi.org/10.1016/j.ijadhadh.2013.09.013
  7. Park, J.M., Kim, D.S., and Kim, S.R., "Improvement of Interfacial Adhesion and Nondestructive Damage Evaluation for Plasma Treated PBO and Kevlar Fibers/epoxy Composites using Micromechanical Techniques and Surface Wettability," Journal of Colloid and Interface Science, Vol. 64, 2003, pp. 431-445.
  8. Garrote, G., Dominguez, H., and Parajo, J.C., "Hydrothermal Processing of Lignocellulosic Materials," Holz als Roh und Werkstoff, Vol. 57, No. 3, 1999, pp. 191-202. https://doi.org/10.1007/s001070050039
  9. Yang, H., Yan, R., Chen, H., Lee, D.H., and Zheng, C., "Characteristics of Hemicellulose, Cellulose and Lignin Pyrolysis," Fuel, Vol. 86, 2017, pp. 1781-1788.
  10. Gledhill, R.A., and Kinloch, A.J., "Environmental Failure of Structural Adhesive Joints," The Journal of Adhesion, Vol. 6, 1974, pp. 315-330. https://doi.org/10.1080/00218467408075035
  11. Bhuiyan, M.T.R., Hirai, N. and Sobue, N., "Changes of Crystallinity in Wood Cellulose by Heat Treatment under Dried and Moist Conditions," Journal of Wood Science, Vol. 46, No. 6, 2000, pp. 431-436. https://doi.org/10.1007/BF00765800
  12. Repellin, V., and Rene, G., "Evaluation of Heattreated Wood Swelling by Differential Scanning Calorimetry in Relation to Chemical Composition," Holzforschung, Vol. 59, No. 1, 2005, pp. 28-34. https://doi.org/10.1515/HF.2005.005