Composites Research

  • 제22권1호
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  • Pages.1-8
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  • 2009
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  • 2288-2103(pISSN)
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  • 2288-2111(eISSN)
한국복합재료학회 (The Korean Society for Composite Materials)
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초기 면내하중을 받는 복합적층판의 저속충격거동 및 손상해석

Low-Velocity Impact Response and Damage Analysis of Composite Laminates Under Initial In-plane Loading

  • 발행 : 2009.02.28
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 면내하중을 받는 복합적층판의 저속충격거동과 손상을 해석하였다. 초기부터 존재하는 면내변형률을 고려하여 판의 변위장을 새롭게 가정하고, 이 가정된 변위장에 따른 적층판의 구조거동에 대한 유한요소방정식을 유도하였으며, 유한요소해석 프로그램을 코딩하였다. 유한요소해석을 수행하여 참고문헌의 수치해석 결과와 비교하였으며, 충격에너지는 동일하나 충격체의 질량과 속도가 다른 조건에 대해서도 해석하여 초기 면내하중의 영향을 분석하였다. 바닥으로부터 첫 번째 층간면에서의 잠재적인 층간분리 파손영역을 추정하여 초기 인내하중 및 충격조건에 따른 크기의 변화를 고찰하였다.

In this paper low-velocity impact response and damage of composite laminates is analytically investigated. A modified displacement field of plate considering initially loaded in-plane strain is proposed. From the displacement field a finite element equation on structural behavior of composite laminate is newly induced and a computational program is coded. Numerical results using the FEM code is compared with the numerical ones from reference. Additional numerical analysis is performed on another impact condition and effect of initial in-plane load is reviewed. Potential delamination damage area in the first inter-ply surface from bottom of laminate is approximated and effect of initial in-plane load and impact condition is also reviewed.

키워드

참고문헌

  1. S. Abrate, "Modeling of Impacts on Composite Structures," Composite Structures, Vol. 51, No. 2, 2001, pp. 129-138 https://doi.org/10.1016/S0263-8223(00)00138-0
  2. J. K. Chen and C. T. Sun, "Dynamic Large Deflection Response of Composite Laminates Subjected to Impact," Composite Structures, Vol. 4, 1985, pp. 59-73 https://doi.org/10.1016/0263-8223(85)90020-0
  3. T. Mitrevski, L. H. Marshall, R. S. Thomson and R. Jones, "Low-Velocity Impacts on Preloaded GFRP Specimens with Various Impactor Shapes," Composite Structures, Vol. 76, 2006, pp. 209-217 https://doi.org/10.1016/j.compstruct.2006.06.033
  4. B. Whittingham, I. H. Marshall, T. Mitrevski and R. Jones, The Response of Composite Structures with Pre-Stress Subject to Low Velocity Impact Damage," Composite Structures, Vol. 66, 2004, pp. 685-698 https://doi.org/10.1016/j.compstruct.2004.06.015
  5. M. D. Robb, W. S. Amold and I. H. Marshall, "The Damage Tolerance of GRP Laminates under Biaxial Prestress," Composite Structures, Vol. 32, 1995, pp. 141-149 https://doi.org/10.1016/0263-8223(95)00077-1
  6. I. H. Choi and C. S. Hong, "Low-Velocity Impact response of Composite Laminates Considering Higher-Order Shear Deformation and Large Deflection," Mechanics of Composite Materials and Structures, Vol. 1, 1994, pp. 157-170 https://doi.org/10.1080/10759419408945825
  7. I. H. Choi, "Response and Damage of Composite Laminates Subjected to Low-Velocity Impact," Ph.D. Thesis, Korea Advanced Institute of Science and Technology, 1994
  8. C. S. Hong, I. H. Choi and C. G. Kim, "Estimation of Damage Area Due to Low-Velocity Impact in Composite Laminate," 9-th Technical Conference Proceeding of the American Society for Composites, 1994. pp. 473-481
  9. S. G. Lim and C. S. Hong, "Prediction of Transverse Cracking and Stiffness Reduction in Cross-Ply Laminates Composites," Journal of Composite Materials, Vol. 23, 1989, pp. 695-713 https://doi.org/10.1177/002199838902300704