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Optimization of postbuckled stiffened panels with multiple stiffener sizes
conference contribution
posted on 2011-07-28, 12:12 authored by Andrew WatsonAndrew Watson, Carol A. Featherston, David KennedyThe panel analysis and optimization code VICONOPT, based on exact strip theory, is
utilized to investigate the optimum design of stiffened panels with multiple stiffener sizes or
substiffeners. The optimization ensures that the buckling stability of the panel includes an
allowance for postbuckling reserve of strength. The adoption of this approach necessarily
results in the local buckling stress being lower than the overall buckling stress and with the
introduction of substiffeners introduces extra buckling modes. This complicates the post
buckling behavior of the panel which is investigated by examining the case when the smaller
stiffeners lose stiffness, i.e. there is a change from a local to a torsional mode. The panels are
loaded in axial compression with a sinusoidal imperfection. It is found that small mass
savings are achieved by using stiffeners of more than one size and there is an increase in the
spacing of the major stiffeners and transverse supports. The optimum panel designs
obtained by VICONOPT are evaluated by comparison with the optimum designs produced
with one size of stiffener.
History
School
- Aeronautical, Automotive, Chemical and Materials Engineering
Department
- Aeronautical and Automotive Engineering
Citation
WATSON, A., FEATHERSTON, C.A. and KENNEDY, D., 2007. Optimization of postbuckled stiffened panels with multiple stiffener sizes. IN: 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Honolulu, Hawaii, 23 - 26 Apr., 8pp.Publisher
© American Institute of Aeronautics and Astronautics (AIAA)Version
- AM (Accepted Manuscript)
Publication date
2007Notes
This is a conference paper. It was presented at the 48th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference [© AIAA].ISBN
1563474352Publisher version
Book series
AIAA;2007-2207Language
- en