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Imperfection-insensitive axially loaded thin cylindrical shells

Ning, Xin and Pellegrino, Sergio (2015) Imperfection-insensitive axially loaded thin cylindrical shells. International Journal of Solids and Structures, 62 . pp. 39-51. ISSN 0020-7683. doi:10.1016/j.ijsolstr.2014.12.030.

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The high efficiency of circular monocoque cylindrical shells in carrying axial loads is impaired by their extreme sensitivity to imperfections and there is an extensive body of literature that addresses this behavior. Instead of following this classical path, focused on circular cross-sections, this paper presents a novel approach that adopts optimal symmetry-breaking wavy cross-sections (wavy shells). The avoidance of imperfection sensitivity is achieved by searching with an evolutionary algorithm for smooth cross-sectional shapes that maximize the minimum among the buckling loads of geometrically perfect and imperfect wavy shells. It is found that shells designed through this approach can achieve higher critical stresses and knockdown factors than any previously known monocoque cylindrical shells. It is also found that these shells have superior mass efficiency to almost all previously reported stiffened shells.

Item Type:Article
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URLURL TypeDescription DOIArticle
Ning, Xin0000-0002-9432-3665
Pellegrino, Sergio0000-0001-9373-3278
Additional Information:© 2015 Elsevier Ltd. Received 19 November 2013; Received in revised form 2 December 2014; Available online 7 February 2015. We thank Professors J.-F. Jullien, P. Koumoutsakos, M.M. Mikulas and E. Ramm for help and advice during the course of this study. We also thank Professors C.R. Calladine, P. Ermanni, J. Hutchinson, K.-C. Park, A.M. Waas and P. Weaver for comments on a preliminary version of this study, presented at the AIAA 54th SDM Conference. J. Steeves provided the lamina properties in Section 4.1. Financial support from the Resnick Institute at the California Institute of Technology is gratefully acknowledged.
Group:Resnick Sustainability Institute, GALCIT
Funding AgencyGrant Number
Resnick Sustainability InstituteUNSPECIFIED
Subject Keywords:Shell buckling; Imperfection-sensitivity; Corrugated shells; Structural optimization; Mass efficiency; Aster shell
Record Number:CaltechAUTHORS:20150604-080335187
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Official Citation:Xin Ning, Sergio Pellegrino, Imperfection-insensitive axially loaded thin cylindrical shells, International Journal of Solids and Structures, Volume 62, 1 June 2015, Pages 39-51, ISSN 0020-7683, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:57997
Deposited By: Tony Diaz
Deposited On:04 Jun 2015 16:18
Last Modified:10 Nov 2021 21:57

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