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Buckling of a Pressurized Hemispherical Shell Subjected to a Probing Force

Author(s)
López Jiménez, Francisco; Hutchinson, John W.; Marthelot, Joel; Lee, Anna; Reis, Pedro Miguel
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
We study the buckling of hemispherical elastic shells subjected to the combined effect of pressure loading and a probing force. We perform an experimental investigation using thin shells of nearly uniform thickness that are fabricated with a well-controlled geometric imperfection. By systematically varying the indentation displacement and the geometry of the probe, we study the effect that the probe-induced deflections have on the buckling strength of our spherical shells. The experimental results are then compared to finite element simulations, as well as to recent theoretical predictions from the literature. Inspired by a nondestructive technique that was recently proposed to evaluate the stability of elastic shells, we characterize the nonlinear load-deflection mechanical response of the probe for different values of the pressure loading. We demonstrate that this nondestructive method is a successful local way to assess the stability of spherical shells.
Date issued
2017-10
URI
http://hdl.handle.net/1721.1/117475
Department
Massachusetts Institute of Technology. Department of Civil and Environmental Engineering; Massachusetts Institute of Technology. Department of Mechanical Engineering
Journal
Journal of Applied Mechanics
Publisher
ASME International
Citation
Marthelot, Joel, et al. “Buckling of a Pressurized Hemispherical Shell Subjected to a Probing Force.” Journal of Applied Mechanics, vol. 84, no. 12, Oct. 2017, p. 121005. © 2017 By ASME
Version: Final published version
ISSN
0021-8936

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