Exterior erosion effects on the buckling of pipes under external pressure

A. P. F. Little, B. Hassanati, C. T. F. Ross

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    This paper presents novel predictions of the collapse pressure of initially circular pipes under external hydrostatic pressure subjected to external erosion and/or corrosion. Models with specific dimensions but varying wear depth along the pipe were created and both linear (eigenvalue) and non-linear buckling analyses using ANSYS APDL with solid shell 190 elements and Workbench with Solid 186 elements were performed. Firstly, the effects of element types on the results were investigated. Then the resulting buckling pressures were compared to investigate the changes in buckling pressure with the variation in the extent of external wear. Nonlinear analyses using ANSYS Workbench Static Structural finite element analyses were then obtained and interpreted. These results enabled the innovative aspect of this work. This was the introduction of a reduction factor to enable the effects of geometry change due to erosion/corrosion on collapse pressures using simpler buckling prediction techniques to be predicted. This unique procedure enables buckling pressures for various external wear depths using Windenburg & Trilling, von Mises and/or design charts to be predicted. This work makes considerable advances towards enabling safe buckling pressures for externally eroded/corroded pipes to be relatively easily and quickly calculated.

    Original languageEnglish
    Title of host publicationProceedings of the Fifteenth International Conference on Civil, Structural and Environmental Engineering Computing
    EditorsJ. Kruis, Y. Tsompanakis, B. H. V. Topping
    PublisherCivil-Comp Press
    ISBN (Print)978-1905088638
    DOIs
    Publication statusPublished - Sep 2015
    EventFifteenth International Conference on Civil, Structural and Environmental Engineering Computing - Prague, Czech Republic
    Duration: 1 Sep 20154 Sep 2015
    http://www.civil-comp.com/pubs/catalog.htm?t=descrip&f=cc15

    Publication series

    NameCivil-Comp Proceedings
    Volume108
    ISSN (Print)1759-3433

    Conference

    ConferenceFifteenth International Conference on Civil, Structural and Environmental Engineering Computing
    Country/TerritoryCzech Republic
    CityPrague
    Period1/09/154/09/15
    Internet address

    Keywords

    • ANSYS
    • buckling
    • external hydrostatic pressure
    • external wear
    • non-linear
    • thinness ratio
    • von Mises

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