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Unimportance of geometric nonlinearity in analysis of flanged joints with metal-to-metal contact

Joshi, Dhananjay and Mahadevan, Pradeep and Marathe, Amol and Chatterjee, Anindya (2007) Unimportance of geometric nonlinearity in analysis of flanged joints with metal-to-metal contact. In: International Journal Of Pressure Vessels And Piping, 84 (7). pp. 405-411.

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Abstract

Gasketless flanged joints with metal to metal contact offer some advantages over gasketed joints such as lower weight and better fatigue life. Design of such joints is often based on finite element analyses, and complicated by the fact that the area of contact between the flanges changes upon application of loads. Such analyses can be done using commercial software, which can incorporate geometrical nonlinearities as well as contact nonlinearities. Engineering intuition suggests that the role of geometrical nonlinearities might be small for such problems. However, many engineers continue to use the fully nonlinear analyses. Our aim in this paper is simply to put on record that significant savings in time can be obtained by turning off geometric nonlinearities in such analyses, with negligible loss of accuracy. To this end, a nonautomated implementation of the basic ideas is first demonstrated for a simple geometry; more automated analyses for a more general geometry follow.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to Elsevier Sci Ltd
Keywords: gasketless flanges; geometric nonlinearity; metal-to-metal contact
Department/Centre: Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 26 Dec 2008 11:10
Last Modified: 19 Sep 2010 04:52
URI: http://eprints.iisc.ernet.in/id/eprint/16607

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