Compliant rolling-contact architected materials for shape reconfigurability

Lucas A. Shaw, Samira Chizari, Matthew Dotson, Yuanping Song and Jonathan B. Hopkins ()
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Lucas A. Shaw: University of California, Los Angeles
Samira Chizari: University of California, Los Angeles
Matthew Dotson: University of California, Los Angeles
Yuanping Song: University of California, Los Angeles
Jonathan B. Hopkins: University of California, Los Angeles

Nature Communications, 2018, vol. 9, issue 1, 1-12

Abstract: Abstract Architected materials can achieve impressive shape-changing capabilities according to how their microarchitecture is engineered. Here we introduce an approach for dramatically advancing such capabilities by utilizing wrapped flexure straps to guide the rolling motions of tightly packed micro-cams that constitute the material’s microarchitecture. This approach enables high shape-morphing versatility and extreme ranges of deformation without accruing appreciable increases in strain energy or internal stress. Two-dimensional and three-dimensional macroscale prototypes are demonstrated, and the analytical theory necessary to design the proposed materials is provided and packaged as a software tool. An approach that combines two-photon stereolithography and scanning holographic optical tweezers is demonstrated to enable the fabrication of the proposed materials at their intended microscale.

Date: 2018
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DOI: 10.1038/s41467-018-07073-5

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