title: Shaping of elastic sheets by prescription of non-Euclidean metrics.
abstract: The connection between a surface's metric and its Gaussian curvature (Gauss theorem) provides the base for a shaping principle of locally growing or shrinking elastic sheets. We constructed thin gel sheets that undergo laterally nonuniform shrinkage. This differential shrinkage prescribes non-Euclidean metrics on the sheets. To minimize their elastic energy, the free sheets form three-dimensional structures that follow the imposed metric. We show how both large-scale buckling and multiscale wrinkling structures appeared, depending on the nature of possible embeddings of the prescribed metrics. We further suggest guidelines for how to generate each type of feature.
authors.affiliation: Racah Institute of Physics, Hebrew University of Jerusalem, Jerusalem, Israel.
authors.forename: Yael
authors.initials: Y
authors.lastname: Klein
authors.forename: Efi
authors.initials: E
authors.lastname: Efrati
authors.forename: Eran
authors.initials: E
authors.lastname: Sharon