The present minimum-mass designs for a two-spar rectangular box beam were derived on the basis of linear-buckling FEM analysis constraints. In order to ascertain the effects of any geometric nonlinearities on these designs, each was subjected to a geometrically nonlinear FEM analysis. In all cases, the structure collapses below the design load, and does so in a mode which differs from that of linear theory. This discrepancy is attributable to such nonlinear panel-interaction mechanisms as rib-crusing loads. The optimized design is highly sensitive to crushing loads, relative to the nonoptimal design.


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    Title :

    Effects of geometric nonlinearities on the response of optimized box beam structures


    Contributors:
    Ragon, S. (author) / Gurdal, Z. (author)

    Conference:

    AIAA, ASME, ASCE, AHS, and ASC, Structures, Structural Dynamics and Materials Conference, 34th and AIAA and ASME, Adaptive Structures Forum ; 1993 ; La Jolla, CA, United States


    Publication date :

    1993-04-01


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English






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