Kirigami actuators

Date Issued
2017-12-28Publisher Version
10.1039/c7sm01693jAuthor(s)
Dias, Marcelo A.
McCarron, Michael P.
Rayneau-Kirkhope, Daniel
Hanakata, Paul Z.
Campbell, David K.
Park, Harold S.
Holmes, Douglas P.
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Show full item recordPermanent Link
https://hdl.handle.net/2144/35583Version
First author draft
Citation (published version)
Marcelo A Dias, Michael P McCarron, Daniel Rayneau-Kirkhope, Paul Z Hanakata, David K Campbell, Harold S Park, Douglas P Holmes. 2017. "Kirigami actuators." SOFT MATTER, Volume 13, Issue 48, pp. 9087 - 9092 (6). https://doi.org/10.1039/c7sm01693jAbstract
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.
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