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Deprecated: Implicit conversion from float 227.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Proc+Natl+Acad+Sci+U+S+A 2015 ; 112 (36): 11175-80 Nephropedia Template TP
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Geometrically controlled snapping transitions in shells with curved creases #MMPMID26294253
Proc Natl Acad Sci U S A 2015[Sep]; 112 (36): 11175-80 PMID26294253show ga
Shape-programmable structures have recently used origami to reconfigure using a smooth folding motion, but are hampered by slow speeds and complicated material assembly. Inspired by natural systems like the leaves of Venus flytraps and hummingbird beaks, we use curved creases to imbue elastic shells with programmable fast ?snapping? motion. This deformation between preprogrammed states can be tuned to be either continuously foldable or snap discontinuously. Our results provide a purely geometrical mechanism for designing multistable structures, thus circumventing the need for complex materials or fabrication methods in creating structures with fast dynamics. This technique will find application in designing structures over a wide range of length scales, including self-folding materials, tunable optics, and switchable frictional surfaces for microfluidics.