Self-folding origami: shape memory composites activated by uniform heating
Self-folding origami: shape memory composites activated by uniform heating
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DOI：
10.1088/0964-1726/23/9/094006
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发表时间：
2014-09-01
影响因子：
4.1
通讯作者：
Wood, Robert J.
中科院分区：
文献类型：
--
作者：
Tolley, Michael T.;Felton, Samuel M.;Wood, Robert J.
自折叠是自然界中经常用于高效制造结构的方法，但很少用于工程系统。这里展示了自折叠折纸，它由形状记忆复合材料组成，在烤箱中均匀加热时被激活。这些复合材料可以使用廉价的材料和工具快速制造。对基于形状记忆聚合物片的面内收缩的折叠机制进行了建模，并表征了自折叠成目标形状的复合材料的设计参数。演示了四种自折叠形状：立方体、二十面体、花朵和三浦图案；每一个都在烤箱中在 4 分钟内激活。还使用热熔粘合剂研究了自密封，发现所得结构可承受高达未密封结构两倍的负载。
Self-folding is an approach used frequently in nature for the efficient fabrication of structures, but is seldom used in engineered systems. Here, self-folding origami are presented, which consist of shape memory composites that are activated with uniform heating in an oven. These composites are rapidly fabricated using inexpensive materials and tools. The folding mechanism based on the in-plane contraction of a sheet of shape memory polymer is modeled, and parameters for the design of composites that self-fold into target shapes are characterized. Four self-folding shapes are demonstrated: a cube, an icosahedron, a flower, and a Miura pattern; each of which is activated in an oven in less than 4 min. Self-sealing is also investigated using hot melt adhesive, and the resulting structures are found to bear up to twice the load of unsealed structures.