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Award ID contains: 2247095

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  1. ; ; ; ; (, Soft Matter)
    A design for a metamaterial with tunable stiffness is introduced. The material can be switched from floppy to rigid by changing the lengths of the constituent beams, which is demonstrated using a temperature-responsive hydrogel. 
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    Free, publicly-accessible full text available April 23, 2026
  2. ; (, arXiv)
    Topology is an important determinant of the behavior of a great number of condensed-matter systems, but until recently has played a minor role in elasticity. We develop a theory for the deformations of a class of twisted non-Euclidean sheets which have a symmetry based on the celebrated Bonnet isometry. We show that non-orientability is an obstruction to realizing the symmetry globally, and induces a geometric phase that captures a memory analogous to a previously identified one in 2D metamaterials. However, we show that orientable ribbons can also obstruct realizing the symmetry globally. This new obstruction is mediated by how the unit normal vector winds around the centerline of the ribbon, and provides conditions for constructing soft modes of deformation compatible with the topology of multiply-twisted connected ribbons. 
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    Free, publicly-accessible full text available February 14, 2026