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Origami/Kirigami-Guided Morphing of Composite Sheets

机译：复合片材的折纸/折纸引导变形

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摘要

Several strategies are recently exploited to transform 2D sheets into desired 3D structures. For example, soft materials can be morphed into 3D continuously curved structures by inducing nonhomogeneous strain. On the other hand, rigid materials can be folded, often by origami/kirigami-inspired approaches (i.e., flat sheets are folded along predesigned crease patterns). Here, for the first time, combining the two strategies, composite sheets are fabricated by embedding rigid origami/kirigami skeleton with creases into heat shrinkable polymer sheets to create novel 3D structures. Upon heating, shrinkage of the polymer sheets is constrained by the origami/kirigami patterns, giving rise to laterally nonuniform strain. As a result, Gaussian curvature of the composite sheets is changed, and flat sheets are transformed into 3D curved structures. A series of 3D structures are folded using this approach, including cones and truncated pyramids with different base shapes. Flat origami loops are folded into step structures. Tessellation of origami loops is transformed into 3D checkerboard pattern.
机译：最近开发了几种策略来将2D图纸转换为所需的3D结构。例如，通过诱导非均匀应变，可以将软材料变形为3D连续弯曲的结构。另一方面，通常可以通过折纸/折纸启发的方法来折叠刚性材料（即，将平板沿着预先设计的折痕图案折叠）。在这里，这是两种方法的首次结合，是通过将带有折痕的刚性折纸/折纸骨架嵌入热收缩性聚合物片材中以制造新颖的3D结构来制造复合材料片材。加热时，聚合物片的收缩受到折纸/折纸图案的限制，从而引起横向不均匀应变。结果，复合片材的高斯曲率被改变，并且平板片材被转换成3D弯曲结构。使用此方法可以折叠一系列3D结构，包括具有不同基本形状的圆锥体和圆锥台。扁平的折纸环被折叠成台阶结构。折纸环的镶嵌细分化为3D棋盘图案。

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