The Belly button (IMAGE)
Caption
A close-up of a self-folding knitted fabric, demonstrating how specific stitch patterns—knits and purls—encode geometric rules that dictate the material’s three-dimensional shape. Researchers from Penn and Drexel have developed a mathematical model that predicts these folding behaviors, opening new possibilities for programmable textiles in fields ranging from soft robotics to deployable structures.
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(Image: Courtesy of Lauren Niu)
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