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Local buckling of composite channel columns

Abstract

The investigation concerns local buckling of compressed flanges of axially compressed composite channel columns. Cooperation of the member flange and web is taken into account here. The buckling mode of the member flange is defined by rotation angle a flange about the line of its connection with the web. The channel column under investigation is made of unidirectional fibre-reinforced laminate. Two approaches to member orthotropic material modelling are performed: the homogenization with the aid of theory of mixture and periodicity cell or homogenization upon the Voigt–Reuss hypothesis. The fundamental differential equation of local buckling is derived with the aid of the stationary total potential energy principle. The critical buckling stress corresponding to a number of buckling half-waves is assumed to be a minimum eigenvalue of the equation. Some numerical examples dealing with columns are given here. The analytical results are compared with the finite element stability analysis carried out by means of ABAQUS software. The paper is focused on a close analytical solution of the critical buckling stress and the associated buckling mode while the web–flange cooperation is assumed.

Citations

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Details

Category:
Articles
Type:
artykuł w czasopiśmie wyróżnionym w JCR
Published in:
CONTINUUM MECHANICS AND THERMODYNAMICS no. 32, pages 555 - 567,
ISSN: 0935-1175
Language:
English
Publication year:
2020
Bibliographic description:
Szymczak C., Kujawa M.: Local buckling of composite channel columns// CONTINUUM MECHANICS AND THERMODYNAMICS. -Vol. 32, (2020), s.555-567
DOI:
Digital Object Identifier (open in new tab) 10.1007/s00161-018-0674-2
Verified by:
Gdańsk University of Technology

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