Fig. 20
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Schematic of perforated sheet structures. (a) Rhombic perforated sheet structure [95]. (b) Star- or triangular-shaped perforated sheet structure [96]. (c) Elliptical perforated sheet structure [97]. (d) Isotropic perforated sheet structure [99]. (e) Slit perforated sheet structure [17]. (f) Perforated sheet structure with randomly oriented cuts [101]. (g) NPR structure obtained via fractal cutting technique [102]. (h) Deformation schematic of perforated sheet with circular holes induced by elastic instability [103]. (i) Peanut-shaped perforated sheet [104]. (j) Bucklicrystal with simple cubic (SC) [22].
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