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A New Holistic Approach to the Local Buckling Behaviour of Open‐Profile Composite Laminated Beams
Author(s) -
Schreiber Philip,
Mittelstedt Christian
Publication year - 2018
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201800015
Subject(s) - buckling , flange , structural engineering , beam (structure) , finite element method , ritz method , composite number , boundary value problem , displacement (psychology) , i beam , materials science , computer science , engineering , mathematics , composite material , mathematical analysis , psychology , psychotherapist
Abstract The present work deals with the local buckling of thin‐walled composite‐beams with I, Z, C, L and T‐cross‐sections under axial load. In this study the analysis of the buckling load of the complete composite‐beam is performed using the Ritz‐method. The individual webs and flanges of the beam are assembled by suitable continuity conditions in one system. In order to achieve that, new displacement shape functions for web and flange that fulfill all boundary conditions have been developed. The present closed‐form analytical method enables the explicit representation of the buckling load for the entire composite‐beam under axial load. The comparison between the present approach and finite element simulations shows a satisfactory conformity. The present method is highly efficient in terms of computational effort and its practical suitability.