Elastic imperfect cylindrical shells of varying length under combined axial compression and bending

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Title: Elastic imperfect cylindrical shells of varying length under combined axial compression and bending
Authors: Wang, J
Sadowski, A
Item Type: Journal Article
Abstract: This paper presents a comprehensive computational investigation into the elastic nonlinear buckling response of near-perfect and highly imperfect uniform thickness thin cylindrical shells of varying length under combined uniform compression and bending. In particular, the elastic ovalisation phenomenon in cylindrical shell of sufficient length under combined compression and bending was systematically investigated with finite elements for the first time. The study considered a representative range of practical lengths up to very long cylinders where ovalisation is fully developed under uniform bending and Euler column buckling controls under uniform axial compression. The imperfection sensitivity of the system was also studied by introducing a single idealised axisymmetric weld depression imperfection at the midspan of the cylinder. The predictions permit an exploration of the nonlinear mechanics of the generally unfavourable interaction between bending and axial compression at the elastic nonlinear buckling limit state in thin long cylinders. The interaction is at its most unfavourable in cylinders where Euler column buckling is about to become critical, and is qualitatively very different from the favourable moment-force interaction at the reference plastic limit state of circular tubes. A simple closed-form algebraic characterisation of the interaction is proposed considering both imperfections and ovalisation.
Date of Acceptance: 3-Sep-2019
URI: http://hdl.handle.net/10044/1/73190
DOI: https://dx.doi.org/10.1061/(ASCE)ST.1943-541X.0002560
ISSN: 0733-9445
Publisher: American Society of Civil Engineers
Journal / Book Title: Journal of Structural Engineering
Copyright Statement: This paper is embargoed until publication.
Sponsor/Funder: Engineering and Physical Sciences Research Council
Funder's Grant Number: EP/N024060/1
Keywords: Civil Engineering
0905 Civil Engineering
Publication Status: Accepted
Embargo Date: publication subject to indefinite embargo
Appears in Collections:Civil and Environmental Engineering



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