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 The thermal and mechanical behaviour of structural steel piping systems
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/8392

title: The thermal and mechanical behaviour of structural steel piping systems
authors: Fonseca, E. M. M.
Melo, F. J. M. Q. de
Oliveira, C. A. M.
keywords: Piping system
Elevated temperatures
Thermo-mechanical analysis
Finite pipe element
issue date: Feb-2005
publisher: Elsevier
abstract: The temperature, the deformation and the stress field in thermo-mechanical problems play a very important role in engineering applications. This paper presents a finite element algorithm developed to perform the thermal and mechanical analysis of structural steel piping systems subjected to elevated temperatures. The new pipe element with 22 degrees of freedom has a displacement field that results from the superposition of a beam displacement, with the displacement field associated with the section distortion. Having determined the temperature field, the consequent thermal displacement produced in the piping systems due to the thermal variation can be calculated. The temperature rise produces thermal expansion and a consequent increase of pipe length in the structural elements. For small values of the ratio of the pipe thickness to mean radius, the thermal behaviour can be calculated with adequate precision using a one-dimensional mesh approach, with thermal boundary conditions of an axisymmetric type across the pipe section. With this condition, several case studies of piping systems subjected to elevated temperatures and mechanical loads are presented and compared with corresponding results from commercial finite element codes. The main advantage of this formulation is associated with reduced time for mesh generation with a low number of elements and nodes. Considerable computational effort may be saved with the use of this finite pipe element.
URI: http://hdl.handle.net/10773/8392
ISSN: 0308-0161
publisher version/DOI: http://dx.doi.org/10.1016/j.ijpvp.2004.06.012
source: International Journal of Pressure Vessles & Piping
appears in collectionsMEC - Artigos

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Thermal-EFonseca.pdfMain document: refers to a paper about a numerical model apporaching the determination of the stress distribution in pipes subjected to mechanical and thermal stresses469.77 kBAdobe PDFview/open
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