NDLI: Perturbation analysis of instability for non-uniform cylindrical shells with initial imperfection

Content Provider	IEEE Xplore Digital Library
Author	Jianghong Xue
Copyright Year	2011
Description	Author affiliation: Department of Mechanics and Civil Engineering, Jinan University / Key Lab of Disaster Forecast and Control in Engineering, Ministry of Education, Guangzhou 510632 (Jianghong Xue)
Abstract	Buckle propagation in subsea corroded pipelines is one of the most concerned problems in offshore industries, while locating the plastic hinges in the corroded pipeline is the crux in determining the buckle propagation pressure. This paper presents a methodology to determine the locations of plastic hinges in non-uniform shells subjected to external pressure. The non-uniform shell used to model the corroded pipeline has two Regions: Region 1 of reduced, inconstant thickness and Region 2 of nominal thickness. Analytical formulas for the bifurcation load, radial deformation, initial yield pressure and stress distribution in the non-uniform shell are derived from perturbation analysis using WKB expansion. The locations of plastic hinges are identified at the stress peaks by taking the derivative of the stress with respect to circumferential coordinate. Imperfection sensitivity of the non-uniform shell is assessed with an emphasis on the role of initial yield pressure and the locations of plastic hinges. Special case when the thickness of Region 2 is constantly reduced is examined. It is found that both the initial yield pressure and the locations of plastic hinges depend on the non-uniform conditions of the cylindrical shell.
Starting Page	661
Ending Page	665
File Size	195346
Page Count	5
File Format	PDF
ISBN	9781424487370
e-ISBN	9781424487387
DOI	10.1109/CCDC.2011.5968265
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-23
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Pipelines Corroded Pipeline Fasteners Bifurcation Plastics Mathematical model Location of Plastic Hinge Buckle Propagation Stress Perturbation Analysis Strain
Content Type	Text
Resource Type	Article

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