Behaviour of Viscoelastic - Viscoplastic Spheres and Cylinders - Fully Plastic Vessel Walls

N. Saabye Ottosen

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    The material model consists of a viscoelastic Burgers element and an additional viscoplastic Bingham element when the effective stress exceeds the yield stress. For fully plastic vessel walls, exact closed-form expressions arc derived for the stress and strain state in pressurised or relaxation loaded thick-walled cylinders in plane strain and spheres. For the spherical problem, the material compressibility is accounted for. The influence of the different material parameters on the behaviour of the vessels is evaluated. It is shown that the magnitude of the Maxwell viscosity is of major importance for the long-term behaviour of thick-walled fully plastic vessels.
    Original languageEnglish
    JournalInternational Journal of Solids and Structures
    Volume21
    Issue number6
    Pages (from-to)561-572
    ISSN0020-7683
    Publication statusPublished - 1985

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