Computational analyses of glass and glass-carbon circular cylinders under uniform external pressure

C. T. F. Ross, A. Liatsis, A. P. F. Little, Paul T. Smith

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

    Abstract

    The investigations, which were carried out for the first time, involved the analyses of 38 composite circular cylinders, using different theoretical methods, and comparing the theoretical results, with the experimental results, to discover which one was the most reliable. The fibre layout of 22 of the glass/carbon circular cylinders was three layers of carbon fibres at 0 degrees (lengthwise) and two layers of E-glass fibres at 90 degrees (circumferentially), and the fibre layout of the glass circular cylinders were in the form of twelve layers of E-glass 0/90⋯0/90 degrees. Previous experimental work done at the University of Portsmouth showed that failure occurred due to the common modes, namely shell instability and axisymmetric deformation, which related to this study. The analyses presented in this paper showed that most of the specimens failed as a result of shell instability. The methods that were used to create a design chart method were obtained from the results of an in-house computer program RCONERTV, and the commercial finite element package ANSYS. Both eigen buckling analysis and nonlinear analyses were carried out. Analyses made by RCONERTV were carried out only for orthotropic properties. The theoretical results taken using ANSYS and RCONERTV were used, together with the experimental results, to produce the design charts. Overall this paper proves that for predicting the critical buckling pressure, for composite material vessels, the von Mises formula results were better and safer. This work is of importance in the design of deep-diving submarine pressure hulls, required for both military and commercial purposes.

    Original languageEnglish
    Title of host publicationProceedings of the Twelfth International Conference on Computational Structures Technology
    EditorsB. H. V. Topping, P. Iványi
    PublisherCivil-Comp Press
    Volume106
    DOIs
    Publication statusPublished - Sep 2014
    EventTwelfth International Conference on Computational Structures Technology - Naples, Italy
    Duration: 2 Sep 20145 Sep 2014
    http://www.civil-comp.com/conf/cstect2014/cst2014.htm

    Publication series

    NameCivil-Comp Proceedings
    PublisherCivil-Comp Press
    ISSN (Print)1759-3433

    Conference

    ConferenceTwelfth International Conference on Computational Structures Technology
    Country/TerritoryItaly
    CityNaples
    Period2/09/145/09/14
    Internet address

    Keywords

    • ANSYS
    • buckling
    • finite element
    • glass composites
    • non-linear analysis
    • submarines

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