IMPLEMENTATION OF A LARGE DISPLACEMENT CAPABILITY FOR VAST - PHASE II

Authors
  1. Jiang, L.
  2. Chernuka, M.W.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);MARTEC Ltd, Halifax NS (CAN)
Abstract
Decribes work performed in the second phase of development of nonlinear, static large rotation (geometric nonlinearity) capabilities in VAST. Following the implementation of an improved scheme for treating large rotations, the corotational procedure for geometrically nonlinear problems developed under a previous contract (1) has been extended to more VAST elements, including the 2-noded general beam, 3-noded triangular plate/shell, 13-noded transition and the 6-noded collapsed thick/thin shell elements. The 4-noded quadrilateral shell element has been reformulated based on a mixed interpolation technique of tensorial strain components. An 8-noded stiffened thick/thin shell element, in which the stiffeners can be located arbitrarily inside the shell, has been developed for both linear and nonlinear static analysis. The curved beam element has been modified to have a capability to model solid circular cross-sections. An approximate formulation for linear elastic composite shell analysis has been implemented. A new linearized buckling analysis capability has been provided. The component mode synthesis methods, which were initially developed at the University of British Columbia, have also been modified and included in the nonlinear version of VAST. Detailed mathematical derivations for the above developments are presented in the report, along with several verification problems.
Keywords
COMPONENT MODE SYNTHESIS
Report Number
DREA-CR-93-447;TR-93-14 — Contractor Report
Date of publication
01 Apr 1993
Number of Pages
258
DSTKIM No
94-05021
CANDIS No
141200
Format(s):
Hardcopy;Originator's fiche received by DSIS

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