Spontaneous bending of pre-stretched bilayers

Meccanica
A DeSimone

Abstract

We discuss spontaneously bent configurations of pre-stretched bilayer sheets that can be obtained by tuning the pre-stretches in the two layers. The two-dimensional nonlinear plate model we use for this purpose is an adaptation of the one recently obtained for thin sheets of nematic elastomers, by means of a rigorous dimensional reduction argument based on the theory of Gamma-convergence (Agostiniani and DeSimone in Meccanica. doi:10.1007/s11012-017-0630-4, 2017, Math Mech Solids. doi:10.1177/1081286517699991, arXiv:1509.07003, 2017). We argue that pre-stretched bilayer sheets provide us with an interesting model system to study shape programming and morphing of surfaces in other, more complex systems, where spontaneous deformations are induced by swelling due to the absorption of a liquid, phase transformations, thermal or electro-magnetic stimuli. These include bio-mimetic structures inspired by biological systems from both the plant and the animal kingdoms.

References

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May 3, 2011·Nano Letters·Silas AlbenElisabeth Smela
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Citations

Aug 20, 2019·Proceedings. Mathematical, Physical, and Engineering Sciences·G OrsiS Vidoli
Jun 16, 2021·The European Physical Journal. E, Soft Matter·Ahmed MourranMartin Möller

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