Multistable Slit Caps
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Publication Date
2016-09-26ISSN
2518-6582
Publisher
International Association for Shell and Spatial Strutures (IASS)
Language
English
Type
Conference Object
This Version
VoR
Metadata
Show full item recordCitation
Sobota, P., & Seffen, K. (2016). Multistable Slit Caps. https://doi.org/10.17863/CAM.10425
Abstract
Multistable shells are structures that have more than one stable state of self-stress. We demonstrate for the first time that an initially stress-free, hemispherical cap with isotropic behaviour can gain at least three additional stable shapes and, hence, states of self-stress, if it is sliced
partially along a given axi-symmetrical meridian. The usual initial and inverted configurations are only slightly affected by slicing. The other configurations are elicited by extra deformations about the inverted shape, which now performs a pre-stressing role. The experimental results are confirmed by finite-element simulations, and it is shown that initially rotationally symmetric structures can gain three stable configurations. Motivated by this, a simplified analytical approach using Foppl-von Karman plate theory is undertaken to analyse the bistable properties of shallow spherical segments. It is shown that the boundary conditions have a dominating influence on the occurrence of multistability.
Keywords
Bistability, multistability, Nonlinear shells, Föppl-von-Kármán plate theory, large deflection shells, snap-through buckling, post-buckling analysis, analytical solution
Sponsorship
Friedrich Ebert Foundation
Identifiers
This record's DOI: https://doi.org/10.17863/CAM.10425
This record's URL: https://www.repository.cam.ac.uk/handle/1810/265258
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