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- W3100014578 endingPage "20170910" @default.
- W3100014578 startingPage "20170910" @default.
- W3100014578 abstract "Depending on its geometry, a spherical shell may exist in one of two stable states without the application of any external force: there are two ‘self-equilibrated’ states, one natural and the other inside out (or ‘everted’). Though this is familiar from everyday life—an umbrella is remarkably stable, yet a contact lens can be easily turned inside out—the precise shell geometries for which bistability is possible are not known. Here, we use experiments and finite-element simulations to determine the threshold between bistability and monostability for shells of different solid angle. We compare these results with the prediction from shallow shell theory, showing that, when appropriately modified, this offers a very good account of bistability even for relatively deep shells. We then investigate the robustness of this bistability against pointwise indentation. We find that indentation provides a continuous route for transition between the two states for shells whose geometry makes them close to the threshold. However, for thinner shells, indentation leads to asymmetrical buckling before snap-through, while also making these shells more ‘robust’ to snap-through. Our work sheds new light on the robustness of the ‘mirror buckling’ symmetry of spherical shell caps." @default.
- W3100014578 created "2020-11-23" @default.
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- W3100014578 date "2018-05-01" @default.
- W3100014578 modified "2023-09-30" @default.
- W3100014578 title "Static bistability of spherical caps" @default.
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- W3100014578 doi "https://doi.org/10.1098/rspa.2017.0910" @default.
- W3100014578 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5990688" @default.
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