Dynamic postbuckling behaviour of eccentrically laminated axially compressed circular cylinders
Keywords:
buckling, postbuckling, shells, composites, dynamic analysisAbstract
The buckling of axially compressed cylindrical shells is a dynamic phenomenon characterized by rapid movements of the shell in radial direction. This transition from the pre-buckling state to a post-buckling state was calculated by FE analyses for two substantially different cylindrical CFRP shells. The buckling loads of these shells differ by almost a factor of two and the post-buckling states of equilibrium only by a minor amount. A sequence of pictures of the intermediate deflection pattern has been assembled, showing the complex transition from the unbuckled state into the stable condition after buckling. It can be seen that both specimens show considerable difference in their dynamic behaviour. Furthermore it could be verified that nonlinear static stability investigations and dynamic analyses yield very similar results for the buckling loads.
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