Composites Research

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

DOI QR Code

An Experimental Study on the Strength of Two Serial Bolt-Fastened Composite Joints under Elevated Temperature and Humid Condition

고온다습 조건($82.2^{\circ}C$)에서 2열 볼트 체결 복합재 조인트의 강도에 관한 실험적 연구

  • Published : 2009.10.31
Download PDF
⟨ Previous Next ⟩

Abstract

The failure strengths and modes in carbon fiber reinforced polymeric composites, with two serial bolt-fastened composite joints, were investigated to evaluate the typical joint configurations of composite components. The parametric studies were performed experimentally at room temperature dry and elevated temperature wet, $82.2^{\circ}C$ on several different laminate configurations. Based on the experimental data presented, two basic load-displacements curves are observed. Each failure mode has the characteristic curve. It is showed that the bearing failure mode occurs in elevated temperature wet condition. It is analysed that the strength of bearing failure mode is not highly depending on the effective modulus of specimen. The failure strength at elevated temperature wet is decreased by the cause of interfacial deterioration between fiber and matrix with moisture absorption.

복합재 부품의 전형적인 조인트 형태를 평가하기 위해서, 2열 볼트 체결 탄소섬유강화 복합재의 파손강도와 파손 모드에 대하여 연구를 수행하였다. 연구는 상온과 고온다습 조건에서 적층과 형상을 변수로 실험적으로 수행되었다. 실험결과를 바탕으로 다음과 같은 결론을 얻었다. 하중-변위 선도는 두 가지 형태로 관찰되었으며, 각 파손 모드는 하중-변위 선도로 특징지어진다. 고온다습 조건의 파손형태는 베어링 파손 모드이며, 베어링 파손 모드에서 파손 강도는 유효강성의 영향이 크지 않다고 분석된다. 고온다습 조건의 파손강도 감소는 침투한 수분에 의해 섬유와 모재의 층간 결합부의 물성 저하에 기인한다.

Keywords

References

  1. Reubgart H,H, abd et al, Composites, ASM International, Vol.1, 1987, pp. 479-495
  2. Vinson J. R., and Sierakowski R. L., The Behacior of Structure Composite Materials, Martinus Nijhoff Publishers, 1989, pp. 239-283
  3. Shen C.H., and Springer G.S., " Effect for Moisture and Temperature on the Tensile Strength of Composite Materials," Journal of Composite Materials, Vol. 11, 1997, pp. 2-6 https://doi.org/10.1177/002199837701100102
  4. 김윤해, 김국진, 한중원, 조영대, 배성영, 문경만, "복합재료의 수분에 의한 열화 및 회복 매커니즘에 관한 연구." 한국복합재료학회지, 제21권, 제2호, 2008, pp. 8-14
  5. Ireman T., Ranvik T., and Eriksson L., "On Damage Developement in Mechanically Fastened Composite Laminates." Composite Structures, Vol. 49, 2000, pp. 151-171 https://doi.org/10.1016/S0263-8223(99)00130-0
  6. Karakuzu R. and et al., "Failure Behavior of Laminated Composite Plates with Two Serial Pin-Loaded Holes," Composite Structures, Vol. 82, 2008, pp. 225-234 https://doi.org/10.1016/j.compstruct.2007.01.002
  7. McCarthy M.A., Lawlor V.P., and Stanley W.F., "An Experimenta‘ Study of Bolt-Hole αearance Effects in Single-lap, Ml1tibolt Composite Joints," Journal of Cornposite Materials, Vol 39, No. 9, 2005, pp. 799-825 https://doi.org/10.1177/0021998305048157
  8. Ahmad H., Johnson W,S., and Counts W.A., "Evaluation of Bolt Bearing Behavior of Highly Loaded Composite Joints at Elevated Temperature," Journal of Composite Materials, Vol 37, No. 6, 2003，pp. 559-571 https://doi.org/10.1177/0021998303037006679
  9. Yan Y., Wen W.D., Chang F.K., and Shyprykevich P., "Experimental Study on Clamping Effccts on the Tensile Strength of Composite Plates with a Bolt-filled Hole," Composite-Part A: Applied Science and Manufacturing, Vol. 30, No. 10, 1999, pp. 1215-1229 https://doi.org/10.1016/S1359-835X(99)00002-0
  10. 김효진, "저온건조(-55$^{\circ}C$) 및 고온다습 조건 (108.3$^{\circ}C$)의 기계적 체결 홀이 탄소섬유강화 복합재의 강도 특성에 미치는 영향 연구." 한국복합재료학회지, 제22권, 제3호, 2009, pp. 82-88
  11. ASTM D 5961, Standard Test Method for Bearing Response of Polymer Matrix Composite Laminates
  12. ASTM D 5229, Standard Test Method for Moisture Abosorption Properties and Equilibrium Conditioning of Polymer Matrix Composite Materials
  13. ASTM D 3039, Standard Method for Tensile Properties of Polymer Matrix Composite Mterials
  14. ASTM D 7248, Standard Test Method for Bearing!Bypass lnteraction Response of Polymer Matrix Corrψosite Lamínates Using 2-Fastenεr Specimens
  15. ASTM D 7248, Standard Test Method for Bearing!Bypass lnteraction Response of Polymer Matrix Corrψosite Lamínates Using 2-Fastenεr Specimens