동력기계공학회지 (Journal of Power System Engineering)

  • 제14권3호
  • /
  • Pages.52-57
  • /
  • 2010
  • /
  • 2713-8429(pISSN)
  • /
  • 2713-8437(eISSN)
한국동력기계공학회 (The Korean Society for Power System Engineering)
권호 표지

응력함수에 기초한 복합 하중하의 복합재 적층판의 층간응력 해석

Stress Function-Based Interlaminar Stress Analysis of Composite Laminates under Complex Loading Conditions

  • 김흥수 (동국대학교 기계로봇에너지공학과) ;
  • 김정윤 (대구가톨릭대학교 기계자동차공학부) ;
  • 김진곤 (대구가톨릭대학교 기계자동차공학부)
  • 투고 : 2009.10.09
  • 심사 : 2010.03.03
  • 발행 : 2010.06.30
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Interlaminar stresses near the free edges of composite laminates have been analyzed considering wall effects. Interface modeling of bonding layer was introduced to explain the wall effect. Using Lekhnitskii stress functions and the principle of complementary virtual work, the interlaminar stresses were obtained, which satisfied the traction free boundary conditions not only at the free edges, but also at the top and bottom surfaces of laminates. The interface modeling provides not singular stresses but concentrated finite interlaminar stresses. The significant amount of reductions of stresses at the free edge are observed compared to the results without interface modeling. The real stress state can be predicted accurately and the results demonstrate the usefulness of the proposed interface modeling for the strength design of composite laminates.

키워드

참고문헌

  1. Pipes R. B. and Pagano N. J., 1970, "Interlaminar Stresses in Composite Laminates Under Uniaxial Extension", Mechanics of Composite Materials, Vol. 4, No. 4, pp. 538-548.
  2. Spilker R. L. and Chou S. C., 1980, "Edge Effects in Symmetric Composite Laminates: Importance of Satisfying the Traction-Free-Edge Condition", Journal of Composite Materials, Vol. 14, pp. 2-20.
  3. Kassapoglou C. and Lagace P. A., 1986, "An Effcient Method for the Calculation of Interlaminar Stresses in Composite Materials", Journal of Applied Mechanics, Vol. 53, pp. 744-750. https://doi.org/10.1115/1.3171853
  4. Yin W. L., 1994, "Free-Edge Effects in Anisotropic Laminates Under Extension, Bending and Twisting. Part 1 - A Stress Function Based Variational Approach", Journal of Applied Mechanics, Vol. 61, pp. 410-415. https://doi.org/10.1115/1.2901459
  5. Cho M. and Kim H. S., 2000, "Iterative Free-Edge Stress Analysis of Composite Laminates under Extension, Bending, Twisting and Thermal Loadings", International Journal of Solids and Structures, Vol. 37, No. 3, pp. 435-459. https://doi.org/10.1016/S0020-7683(99)00014-1
  6. Kim H. S., Rhee S. Y. and Cho M., 2008, "Simple and Efficient Interlaminar Stress Analysis of Composite Laminates with Internal Ply-Drop", Composite Structures, Vol. 84, No. 1, pp. 73-86. https://doi.org/10.1016/j.compstruct.2007.06.004
  7. Whitney J. M. and Nuismer R. J., 1974, "Stress Fracture Criteria for Laminated Composites Containing Stress Concentration", Journal of Composite Materials, Vol. 8, No. 3, pp. 253-265. https://doi.org/10.1177/002199837400800303
  8. 김흥수, 김정윤, 김진곤, 2009, "응력함수와 층간면 모델링을 이용한 복합재 적층판의 3차원 응력해석", 한국동력기계공학회지, 제13권, 제4호, pp. 49-55.
  9. Lekhnitskii S. G., 1963, Theory of Elasticity of an Anisotropic Body, Holden-Day, San Francisco.
  10. Blevins R. D., 1979. "Formulas for Natural Frequency and Mode Shape", Van Nostrand Reinhold Ltd, New York.