Numerical Method for Nonlinear Analysis of Composite Shells under Constant Lateral Pressure and Incremented In-plane Compression

일정 횡압력과 증분 압축하중을 동시에 받는 복합재 쉘의 비선형 해석을 위한 수치기법 연구

  • 김진호 (경상대학교 산업대학원) ;
  • 권진희 (경상대학교 항공기계공학부, 항공기부품기술연구센터)
  • Published : 2000.02.01

Abstract

This paper presents a modified arc-length method for the nonlinear finite element analysis of a structure which is loaded in incremental and fixed forces, simultaneously. The main idea of the method is to separate the displacement term by the constant force from that by the incremental force. Presented method is applied to the nonlinear analysis of isotropic shell structures separately loaded by lateral pressure or compression, and shows the excellent agreement with previous results. As an illustrative example of the applicability of the present algorithm, a parametric study is performed on the nonlinear buckling analysis of composite cylindrical panels under the combined load of the incremented compression and the constant lateral pressure.

본 논문에서는 크기가 일정한 비증분 하중과 크기가 커서 증분이론을 사용해야만 하는 증분하중이 동시에 가해지는 구조물의 비선형 해석을 위한 수정 호길이법을 제시한다. 수정된 호길이법에서는 비선형 계산을 수행할 때 증분하중에 의한 변위와 비증분 하중에 의한 변위를 구분하여 처리하게 된다. 제안된 방법의 타당성은 내압, 외압 및 압축하중을 받는 쉘 구조물의 비선형 거동에 대한 기존 결과와의 비교를 통해 검토하였다. 또한 비증분 하중과 증분하중이 함께 가해지는 대표적인 경우로서, 일정 횡압력과 축방향 증분 압축하중을 동시에 받는 쉘 구조물의 비선형 좌굴거동에 대한 인자연구를 수행하였다.

Keywords

References

  1. Quarterly of Applied Mathematics v.39 Buckling under Axial Compression of Long Cylindrical Shells with Random Axsisymmetric Imperfection J. C. Amazigo
  2. AIAA Journal v.13 Compression Buckling Tests of Laminated Graphite-Epoxy Curved Panels D. J. Wilkins
  3. International Journal of Solids and Structures v.11 Influence of General Imperfection in Axially Load Cylindrical Shells J. S. Hansen
  4. AIAA Journal v.15 General Random Imperfection in The Buckling of Axially Loaded Cylinders J. S. Hansen
  5. AIAA Journal v.17 Buckling of Imperfect Anisotropic Circular Cylinders under Combined Loading M. Boonton;R. C. Tennyson
  6. AIAA Journal v.19 Buckling of Shells-Pitfall for Designers D. Bushnell
  7. Computers and Structures v.15 Numerical and Experimental Investigations of The Buckling Behavior of Composite Panels N. R. Bauld, Jr.;N. S. Khot
  8. Structural Stability W. F. Chen;E. M. Lui
  9. Computers and Structures v.29 Buckling Behavior of Laminated Composite Cylindrical Panels under Axial Compression S. M. Jun;C. S. Hong
  10. International Journal of Solids and Structures v.15 An Incremental Approach to The solution of Snapping and Buckling Problems E. Riks
  11. Computers and Structures v.13 A Fast incremental/Iterative Solution Procedure that Handles Snap-Through M. A. Crisfield
  12. Computers and Structures v.53 An Improved Arc-Length Method for Postbuckling Analysis of composite Cylindrical Panels J. H. Kweon;C. S. Hong
  13. Computers and Structures v.13 Large Deflection Analysis of Laminated Shells by Finite Element Method T. Y. Chang;K. Sawamiphakdi
  14. Computers and Structures v.31 Postbuckling Analysis of Shells by Spline Finite Strip Method D. S. Zhu;Y. K. Cheung