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Figure 7. (a) Stowed configuration and (b) deployed configuration of the Shape Memory Polymer (SMP) “honeycomb”.
FROM:
Robin M. Neville, Jianguo Chen, Xiaogang Guo, Fenghua Zhang, Wenxin Wang, Yousef Dobah, Fabrizio Scarpa, Jinsong Leng and Hua-Xin Peng,
“A Kirigami shape memory polymer honeycomb concept for deployment”, Smart Materials and Structures, Vol. 26, No. 5, 05LT03, May 2017
ABSTRACT: We present a shape memory polymer (SMP) honeycomb with tuneable and shape morphing mechanical characteristics. Kirigami (Origami with cutting allowed) techniques have been used to design and manufacture the honeycomb. The cellular structure described in this work has styrene SMP hinges that create the shape change and the deployment actuation. To create a large volumetric deployment, the Kirigami open honeycomb configuration has been designed by setting an initial three-dimensional re-entrant auxetic (negative Poisson's ratio) configuration, while the final honeycomb shape assume a convex (positive Poisson's ratio) layout. A model was developed to predict the shape change of the structure, and compared to experimental results from a demonstrator honeycomb deployment test.
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