Advisor(s)

Ashkan Vaziri

Contributor(s)

Hameed Metgalch

Date of Award

2011

Date Accepted

8-2011

Degree Grantor

Northeastern University

Degree Level

M.S.

Degree Name

Master of Science

Department or Academic Unit

College of Engineering, Department of Mechanical and Industrial Engineering

Keywords

mechanical engineering, engineering, buckling, buckling analysis, cracked cylinder, cylindrical shell, elastic liner

Disciplines

Mechanical Engineering

Abstract

Shell structures have been widely used in engineering applications such as pipelines, aerospace and marine structures, and cooling towers. Occurring suddenly and generally inadvertently due to its nature, buckling is one of the main failure considerations in the design of these structures. Presence of defects, such as cracks, corrosion pits, blow-out holes, in shell structures may severely compromise their buckling behavior and jeopardize the structural integrity.

In this study, a numerical investigation on the buckling behavior of a cracked cylindrical shell reinforced with an elastic liner and subjected to combined axial compression was carried out. The effect of supporting liner on the buckling behavior of the cracked shell at different crack sizes and orientations were investigated. In the next step, the buckling behavior of a cracked cylindrical shell with an elastic liner subjected to the internal pressure and axial compression was studied. Different buckling modes of the cracked shell, including global, transition and locales modes are identified for different loading conditions.

The results showed that longitudinal crack has a more detrimental effect on the buckling strength of the cylindrical shell in cylinders with no elastomeric liner or with elastomeric liners with low relative stiffness. In addition, cylinders with elastomeric liners of high relative stiffness circumferential crack have a more detrimental effect on the buckling strength of the cylindrical shell.

Document Type

Master's Thesis

Rights Information

copyright 2011

Rights Holder

Yoontae Kim


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