Auxetic structure - Grasshopper test

Test of the auxetic structure based on the simple unit component developed by by Overvelde et al.(2016).
Reference:
Overvelde, JTB, de Jong, TA, Shevchenko, Y, Becerra, SA, Whitesides, GM, Weaver, JC, Hoberman, CH and Bertoldi, K 2016, ’A three-dimensional actuated origami-inspired transformable meta material with multiple degrees of freedom’, Nature Communications, 7(10929), pp. 1-8.