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Kirigami actuators

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Abstract

Thin elastic sheets bend easily and, if they are patterned with cuts, can deform in sophisticated ways. Here we show that carefully tuning the location and arrangement of cuts within thin sheets enables the design of mechanical actuators that scale down to atomically-thin 2D materials. We first show that by understanding the mechanics of a single non-propagating crack in a sheet, we can generate four fundamental forms of linear actuation: roll, pitch, yaw, and lift. Our analytical model shows that these deformations are only weakly dependent on thickness, which we confirm with experiments on centimeter-scale objects and molecular dynamics simulations of graphene and MoS2 nanoscale sheets. We show how the interactions between non-propagating cracks can enable either lift or rotation, and we use a combination of experiments, theory, continuum computational analysis, and molecular dynamics simulations to provide mechanistic insights into the geometric and topological design of kirigami actuators.

Graphical abstract: Kirigami actuators

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Publication details

The article was received on 22 Aug 2017, accepted on 14 Sep 2017 and first published on 15 Sep 2017


Article type: Communication
DOI: 10.1039/C7SM01693J
Citation: Soft Matter, 2017, Advance Article
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    Kirigami actuators

    M. A. Dias, M. P. McCarron, D. Rayneau-Kirkhope, P. Z. Hanakata, D. K. Campbell, H. S. Park and D. P. Holmes, Soft Matter, 2017, Advance Article , DOI: 10.1039/C7SM01693J

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