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24 April 2024 |
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Kirigami Actuators | | Marcelo A. Dias
; Michael P. McCarron
; Daniel Rayneau-Kirkhope
; Paul Z. Hanakata
; David K. Campbell
; Harold S. Park
; Douglas P. Holmes
; | | Date: |
Tue, 18 Jul 2017 05:33:25 GMT (1836kb,D) | | 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 at centimeter scale
objects and molecular dynamics simulations of graphene and MoS$_{2}$ 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. | | Source: | arXiv, 1707.5477 | | Services: | Forum | Review | PDF | Favorites | |
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