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Design and testing of imperfection-insensitive monocoque cylindrical shells

Ning, Xin and Pellegrino, Sergio (2013) Design and testing of imperfection-insensitive monocoque cylindrical shells. In: 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. American Institute of Aeronautics and Astronautics , Reston, VA, Art. No. 2013-1768. ISBN 9781624102233. https://resolver.caltech.edu/CaltechAUTHORS:20190826-092412987

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Abstract

The high efficiency of monocoque cylindrical shells in carrying axial loads is curtailed by their extreme sensitivity to imperfections. For practical applications, this issue has been alleviated by introducing closely stiffened shells which, however, require expensive manufacturing. Here we present an alternative approach that provides a fundamentally different solution. We design symmetry-breaking wavy cylindrical shells that avoid imperfection sensitivity. Their cross-section is formulated by NURBS interpolation on control points whose positions are optimized by evolutionary algorithms. We have applied our approach to both isotropic and orthotropic shells and have also constructed optimized composite wavy shells and measured their imperfections and experimental buckling loads. Through these experiments we have confirmed that optimally designed wavy shells are imperfection-insensitive. We have studied the mass efficiency of these new shells and found them to be more efficient than even a perfect circular cylindrical shell and most stiffened cylindrical shells.


Item Type:Book Section
Related URLs:
URLURL TypeDescription
https://doi.org/10.2514/6.2013-1768DOIArticle
ORCID:
AuthorORCID
Ning, Xin0000-0002-9432-3665
Pellegrino, Sergio0000-0001-9373-3278
Additional Information:© 2013 American Institute of Aeronautics and Astronautics.
Group:GALCIT
Other Numbering System:
Other Numbering System NameOther Numbering System ID
AIAA Paper2013-1768
Record Number:CaltechAUTHORS:20190826-092412987
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20190826-092412987
Official Citation:Design and testing of imperfection-insensitive monocoque cylindrical shells Xin Ning and Sergio Pellegrino 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. https://doi.org/10.2514/6.2013-1768
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98223
Collection:CaltechAUTHORS
Deposited By: George Porter
Deposited On:26 Aug 2019 16:54
Last Modified:03 Oct 2019 21:39

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