Imperfections in Cylindrical Shells Resulting from Fabrication Misfits
Publication: Journal of Engineering Mechanics
Volume 125, Issue 4
Abstract
This paper presents part of a rigorous numerical study of the geometry changes in cylindrical shells due to localized fabrication misfit and the associated consistent residual stress field. The search for practically useful and credible modes of imperfections has led to this study of the geometric imperfections arising from misfits of construction. These are treated here by using a geometrically nonlinear analysis to study the effect of a mismatch in geometry at a point or a seam in a cylinder, or alternatively to explore the role of weld shrinkage in the formation of geometric imperfections. The imperfect geometries arising from these misfits are demonstrated, and some simplifications are given so that their shape may later be used in methods for characterizing imperfection patterns that can be applied to measurements of structures in service. It is found that the geometrical changes are essentially linear for most of the shrinkages considered.
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Information & Authors
Information
Published In
Journal of Engineering Mechanics
Volume 125 • Issue 4 • April 1999
Pages: 410 - 418
History
Received: Dec 29, 1997
Published online: Apr 1, 1999
Published in print: Apr 1999
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