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Post-Buckling of Composite I-Sections. Part 1: Theory.
- Source :
- Journal of Composite Materials; May2001, Vol. 35 Issue 9, p774-796, 23p
- Publication Year :
- 2001
-
Abstract
- Atheoretical investigation of initial local buckling and post-buckling behavior of composite I-sections is presented. The equilibrium equation for initial buckling is solved both exactly and with an approximate method, namely, Galerkin’s method. In Galerkin’s method, the out-of-plane deflection of each plate element is approximated by a weighted sum of polynomial functions. The post-buckling response is studied as an extension of the approximate analysis with Galerkin’s method where now both equilibrium and compatibility equations must be solved. The bending deflection in the post-buckling regime is assumed to be a magnification of the deflection function used in initial buckling analysis. No mode-shape change is thus allowed in the post-buckling region. A polynomial type of function is also adopted for stress distribution in order to take into account the deviation from uniform in-plane load distribution in the plate elements following the onset of local buckling. The paper provides an efficient and accurate method for predicting the post-buckling behavior of composite structural sections composed of plate elements. Galerkin’s methodwas previously applied to isotropic flat plates only. The present approach is tested against a commercial code, STAGS, with a very good agreement in results and a very large saving in computer time for post-buckling analysis of an I-section. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00219983
- Volume :
- 35
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- Journal of Composite Materials
- Publication Type :
- Academic Journal
- Accession number :
- 55005840
- Full Text :
- https://doi.org/10.1177/002199801772662488