BUCKLING AND POST-BUCKLING OF STIFFENED SHELL STRUCTURES USING A CO-ROTATIONAL FINITE ELEMENT FORMULATION

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Authors
  1. Jiang, L.
  2. Chernuka, M.W.
Corporate Authors
MARTEC Ltd, Halifax NS (CAN);Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
Accurate predictions of the buckling loads and the post-buckling responses of stiffened shell structures are of particular interest in submarine design. In this paper, a co-rotational, updated Lagrangian finite element formulation is presented for geometrically nonlinear structural analysis. This formulation has been incorporated into all the plate/shell and beam elements in the general purpose finite element program VAST along with a group of advanced solution techniques including the displacement control and Crisfield's arc-length methods. In finite element analyses using VAST, stiffened shelss can be modelled by either combining compatible shell and beam elements or employing the newly developed stiffened shell element. In the former, beam elements must coincide with shell element edges, whereas in the latter, beam stiffeners are permitted to be located anywhere inside the shell element. Both finite element models have been used to investigate the buckling and post-buckling behaviour of various ring stiffened cylindrical shells under hydrostatic loading. Special emphasis is placed on the sensitivity of geometric imperfections. Excellent numerical solutions have been obtained in the present study.
Report Number
DREA-NAMT-93-4-PAP-17 — CONTAINED IN 99-00578
Date of publication
30 Apr 1993
Number of Pages
22
DSTKIM No
99-00596
CANDIS No
510322
Format(s):
Hardcopy;Document Image stored on Optical Disk

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