A study of elastic lateral distortional buckling of cantilever monosymmetrical I-beams is presented. The method assumes that the flange cross-sections remain straight (undistorted) during buckling, but that the web is free to distort. Three different load patterns are considered: an end moment load, a uniformly distributed lateral pressure and an end point load. The study applied a Rayleigh–Ritz method that the authors previously developed for simply supported beams to cantilevers. The accuracy of the method is verified by comparing the results with a general finite element linear buckling analysis, using NX/Nastran. The method offers advantages over commonly used finite element analysis because it is mesh-free and requires only 6 × n degrees of freedom; therefore, the solution process is rapid and suitable for design space exploration. For doubly symmetric I-beams, a cubic transverse normal stress distribution, derived from the equation of equilibrium, was used in the total potential energy. The results were compared to the previous method which used a linear stress distribution.


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    Title :

    Elastic lateral distortional buckling analysis of cantilever I-beams


    Contributors:
    Ma, Ming (author) / McNatt, Tobin (author) / Hays, Bruce (author) / Hunter, Shaun (author)

    Published in:

    Publication date :

    2013-06-01


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





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