Exploring multistability in prismatic metamaterials through local actuation

Agustin Iniguez-Rabago, Yun Li and Johannes T. B. Overvelde ()
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Agustin Iniguez-Rabago: AMOLF
Yun Li: AMOLF
Johannes T. B. Overvelde: AMOLF

Nature Communications, 2019, vol. 10, issue 1, 1-10

Abstract: Abstract Metamaterials are artificial materials that derive their unusual properties from their periodic architecture. Some metamaterials can deform their internal structure to switch between different properties. However, the precise control of these deformations remains a challenge, as these structures often exhibit non-linear mechanical behavior. We introduce a computational and experimental strategy to explore the folding behavior of a range of 3D prismatic building blocks that exhibit controllable multifunctionality. By applying local actuation patterns, we are able to explore and visualize their complex mechanical behavior. We find a vast and discrete set of mechanically stable configurations, that arise from local minima in their elastic energy. Additionally these building blocks can be assembled into metamaterials that exhibit similar behavior. The mechanical principles on which the multistable behavior is based are scale-independent, making our designs candidates for e.g., reconfigurable acoustic wave guides, microelectronic mechanical systems and energy storage systems.

Date: 2019
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DOI: 10.1038/s41467-019-13319-7

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