DOI QR코드

DOI QR Code

Post-Buckling Behaviour and Buckling Strength of the Circular Cylinder Under Axial Compression

압축하중을 받는 원통실린더의 후좌굴 거동 및 좌굴강도

  • Koo, Bon Guk (Department of Naval Architecture and Marine Engineering, Changwon National University)
  • 구본국 (창원대학교 조선해양공학과)
  • Received : 2018.01.29
  • Accepted : 2018.04.27
  • Published : 2018.04.30

Abstract

Cylindrical shells are often used in the construction of ship and land-based structures such as deck plating with a camber, side shell plating for fore and aft part pipes, as well as storage tanks. It has been believed that such curved shells can be modeled fundamentally as a part of the cylinder under axial compression. From the estimations made based on cylindrical models, it is known that in general, curvature increases the buckling strength of a curved shell when subjected to axial compression, and the same curvature is also expected to increase the overall strength. A series of elastic large deflection analyses were conducted in order to clarify the fundamentals observed in the buckling and post-buckling behaviour of circular cylinders under axial compression. In the present paper, an FE-series analysis has been performed based on the elastic large deflection behaviour, and the effect of parameters has been clarified. The ultimate strength behavior of the circular cylinder was found to be significantly influenced by both the initial deflection and the FE-modeling method.

곡률을 갖고 있는 쉘 부재들은 선박 및 육상구조 내에서 캠버와 선수, 선미, 파이프 및 저장용 탱크에 주로 사용되고 있다. 이러한 곡률 쉘 부재들은 기본적으로 원통형 실린더 부재의 일부라고 간주할 수 있다. 일반적으로 곡률의 존재는 압축하중 작용 시 좌굴강도 및 최종강도를 증가시키는 것으로 알려져 있다. 본 논문에서는 이러한 영향을 확인하기 위하여 탄성대변형 시리즈해석을 수행하였으며, 매개변수의 영향을 분석하였다. 실린더의 최종강도 거동은 초기처짐과 해석모델링 방법에 큰 영향을 받는 것을 확인하였다.

Keywords

References

  1. ANSYS Inc.(2015), Technical user's manual for nonlinear analysis, Chapter 3, pp. 120-145.
  2. Jiao, P., Z. Chen, F. Xu, X. Tang and W. Su(2018), Effects of ringed stiffener on the buckling behaviour of cylindrical shells with cutout under axial compression : Experimental and numerical investigation, Volume 123, pp. 232-243. https://doi.org/10.1016/j.tws.2017.11.013
  3. Wagner, H. N. R. and C. Huhne(2018), Robust knockdown factors for the design of cylindrical shells under axial compression : potentials, practical application and reliability analysis, Volume 135, pp. 410-430. https://doi.org/10.1016/j.ijmecsci.2017.11.020
  4. Wang, B., S. Zhu, P. Hao, X. Bi, K. Du, B. Chen, X. Ma and Y. J. Chao(2018), Buckling of quasi-perfect cylindrical shell under axial compression : A combined experimental and numerical investigation, Volume 130-131, pp. 232-247. https://doi.org/10.1016/j.ijsolstr.2017.09.029
  5. Yao, T., J. Taby and T. Moan(1998), Ultimate strength and post-ultimate strength behaviour of damaged tubular members in offshore structures, Journal of offshore mechanical architecture engineering, Vol. 110, pp. 254-262.