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.
Effects of geometric nonlinearities on the response of optimized box beam structures
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
1993-04-01
Conference paper
No indication
English
Vibration Testing of Aeroelastic Structures Containing Geometric Stiffness Nonlinearities
British Library Conference Proceedings | 2013
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