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| Buckling analysis of composite cylindrical shell with built-in rectangular delamination by mixed variables strip transfer function method |
| Revised:July 01, 2003 |
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| DOI：10.7511/jslx20053053 |
| KeyWord:buckling,built-in delamination,mixed variables,super shell element,strip transfer function method |
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| Abstract: |
| In the engineering application of a composite cylindrical shell, the local patch-shaped delaminations, which can be simulated with rectangular or circular delaminations, are easy to emerge. In this paper, a mixed variables strip transfer function method is presented for analyzing the stability problem of orthotropic cylindrical shell with built-in rectangular delaminations. First, based on Mindlin's shell theory, the improved energy function with mixed variables for cylindrical shell is established by defining generalized force variables and mixed state variables. Then, in order to solve the problem of delaminated shell with separated-region method conveniently, based on a mixed variables strip transfer function method, two kinds of super shell elements with or without delamination are established by introducing strip elements. And based on these super shell elements, the characteristic equation for buckling analysis of laminated shell with built-in rectangular delamination is gotten by dividing the delaminated shell into several super shell elements and enforcing the displacement continuity and force balance at the inter-connecting nodes that connect each super shell element. Finally, buckling load and mode can be calculated from the characteristic equation. The results of numerical examples analysis valid the method in this paper and the influences of multi-factors on buckling load are presented. |
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