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PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
A Nonlinear Model for the Analysis of Composite Beams including Warping Effects
A. Genoese, A. Genoese, A. Bilotta and G. Garcea
Dipartimento di Informatica, Modellistica, Elettronica e Sistemistica, University of Calabria, Italy
A. Genoese, A. Genoese, A. Bilotta, G. Garcea, "A Nonlinear Model for the Analysis of Composite Beams including Warping Effects", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 153, 2014. doi:10.4203/ccp.106.153
Keywords: nonuniform warping, composite beams, geometrically exact beams, buckling analysis..
A geometrically nonlinear beam model suitable to describe complex three-dimensional effects arising from non-uniform warping including non-standard in-plane distortions of the cross-section or from the anisotropy and heterogeneity of the material is presented. Each section is endowed with a corotational frame where statics and kinematics are described using a refined linear elastic model which exploits a semi-analytical solution of the Cauchy continuum problem based on a finite element discretization of the cross-section. The stress field in this way is fully three-dimensional, permitting the recovery of the standard Saint Venant solution or its generalization to inhomogeneous and anisotropic materials, while some additional relevant strain modes of the crosssection are evaluated in a simple way. Buckling analysis results are presented and compared with reference solutions obtained using the commercial code ABAQUS.
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