Abstract:Architected two-dimensional (2D) lattice materials consisting of elastic beams are appealing because of their tunable sign of Poisson’s ratio. A common belief is that such materials with positive and negative Poisson’s ratios display anticlastic and synclastic curvatures, respectively, when bent in one direction. Here, we show theoretically and demonstrate experimentally that this is not true. For 2D lattices with star-shaped unit cells, we find a transition between anticlastic and synclastic bending curvature… Show more
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