Some asymptotic results concerning the buckling of a spherical shell of arbitrary thickness |
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Authors: | Yibin Fu |
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Institution: | a1Department of Mathematics, University of Keele, Staffordshire ST5 5BG, UK |
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Abstract: | For a spherical shell of arbitrary thickness which is subjected to an external hydrostatic pressure, symmetrical buckling takes place at a value of μ1 which depends on
and the mode number, where A1 and A2 are the undeformed inner and outer radii, and μ1 is the ratio of the deformed inner radius to the undeformed inner radius. In the large mode number limit, we find that the dependence of μ1 on
has a boundary layer structure: it is a constant over almost the entire region of
and decreases sharply from this constant value to unity as
tends to unity (the thin-shell limit). Simple asymptotic expressions for the bifurcation condition are obtained. The classical result for thin shells is recovered directly from the equations of finite elasticity, and an asymptotic critical neutral curve (which envelops the neutral curves corresponding to different mode numbers) is obtained. |
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Keywords: | buckling finite strain shell elastic material |
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