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 Mixed formulation solution and optical based experimental methods in the deformation analysis of radially loaded cylindrical shells
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6017

title: Mixed formulation solution and optical based experimental methods in the deformation analysis of radially loaded cylindrical shells
authors: Madureira, L. R.
Vaz, M.
Monteiro, J.
Ramos, N. Viriato
Melo, F. Q.
keywords: cylindrical shells
Fourier series
interferometric techniques
mixed formulation
issue date: Dec-2011
publisher: Wiley-Blackwell
abstract: A mixed formulation in the characterization of internal forces and displacements in cylindrical shells, subjected to radial forces is presented. This numerical approach is proposed as an alternative to the irreducible formulation, where in some problems this solution leads to stress distribution presenting some discontinuity along the edge joining shell modules with different geometry as, for example, curved pipes with tangent terminations. The mixed formulation here proposed prescribes the continuity in the stress field at shell adjacent sections, while practically ensures similar accuracy in the displacement and stress fields. The force and displacement formulations are carried out by combining unknown analytic functions with trigonometric expansions. The solution can be applied to recurrent problems in piping design as is the case of edge forces and radial loads. Examples considering these external parameters are developed and results are compared with an experimental method based on optical interferometric techniques. These procedures were applied with video recording of the interferometric pattern and allow the displacement field assessment with a non-contact procedure.
URI: http://hdl.handle.net/10773/6017
ISSN: 1475-1305
publisher version/DOI: http://dx.doi.org/10.1111/j.1475-1305.2009.00725.x
source: Strain: an International Journal for Experimental Mechanics
appears in collectionsMEC - Artigos

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Madureira-et-al-strain2011.pdfMain document: refers to a paper about a numerical model approaching the determination of the stress distribution in straight pipes subjected to radial loads. The investigation is complemented with non-contact optical techniques to validate the numerical solution420.45 kBAdobe PDFview/open
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