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Asymptotic limits and wrinkling patterns in a pressurised spherical cap.

Coman, C D; Bassom, A P* (2016) Asymptotic limits and wrinkling patterns in a pressurised spherical cap. Int. J. Non-Linear Mech., 81. pp. 8-18.

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Abstract

The asymmetric bifurcation problem for a shallow spherical cap is examined. The applied pressure can act either external or internal to the cap and both cases are treated here. Assuming a nonlinearaxisymmetric basic state, the linearised bifurcation equations for the pressurised shell are investigated in the limit when the thickness of the cap is much less than the maximum rise of the shell mid-surface.Within this regime the wrinkling patterns in both cases are confined to a narrow zone near the edge of the shell, making it possible to solve asymptotically the corresponding equations and derive analytical predictions for both the critical pressure and the corresponding number of wrinkles. Some comparisons with direct numerical simulations are included as well.

Item Type: Article
Keywords: shallow shells, wrinkling instabilities, asymptotic methods
Subjects: Advanced Materials
Advanced Materials > Materials Modelling
Identification number/DOI: 10.1016/j.ijnonlinmec.2015.12.004
Last Modified: 02 Feb 2018 13:13
URI: http://eprintspublications.npl.co.uk/id/eprint/7044

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