Programmable Kiri‐Kirigami Metamaterials

Abstract

Programmable kirigami metamaterials with controllable local tilting orientations on demand through prescribed notches are constructed through a new approach of kiri-kirgami, and their actuation of pore opening via both mechanical stretching and temperature, along with their potential application as skins for energy-saving buildings, is discussed.

Programmable Hierarchical Kirigami

“…Moreover, larger values of δ 1 /l always lead to a larger φ for both γ = 0° and γ = 90° loading. As such, our results indicate that in addition to notches, [11] multistability, [14] and aperiodicity, [17] also hierarchical cuts can be exploited to realize displays and encryption based on kirigami principles. Figure 8.…”

“…The results reported in Figure 3a (for γ = 0°) and Figure 3b (for γ = 90°) indicate that plastic deformation significantly affects the stress-strain response of the structures past the initial linear regime. As such, these results suggest that analyses based on a linear material response [11,13,14,31] may not fully capture the response of kirigami sheets, since the large local strains are expected to induce plastic deformation in most materials. Moreover, in the case of a purely elastic material the second plateau observed in both experiments and elastoplastic simulations is suppressed for the structure with δ 1 /δ 2 < 1, as the response is dominated by the stretching of the δ 1 ligaments.…”

“…[8,9] Recently, kirigami-the Japanese art of paper cutting-has been identified as a powerful tool to realize programmable mechanical metamaterials. [10][11][12][13][14][15] A key feature of kirigami metamaterials is that they are conveniently…”

“…[24,25] However, most of the previous studies on hierarchical kirigami metamaterials have considered thick sheets and focused on their in-plane deformation. [11] Here, we demonstrate how structural hierarchy can be exploited to realize thin kirigami metamaterials with highly nonlinear mechanical responses and complex deformationinduced 3D pattern transformations. [11] Here, we demonstrate how structural hierarchy can be exploited to realize thin kirigami metamaterials with highly nonlinear mechanical responses and complex deformationinduced 3D pattern transformations.…”

Programmable Controls of Multiple Modes of Spoof Surface Plasmon Polaritons to Reach Reconfigurable Plasmonic Devices

“…[2][3][4][5][6] To overcome the complexity of 3D structures, an ultrathin corrugated metallic strip was proposed in 2013 to support and guide the SSPPs with high confinement even when it was bent, twisted, or wrapped arbitrarily. [21][22][23][24][25][26][27] However, only a few works for the dynamic manipulation of SSPPs have been reported at both terahertz [28][29][30] and microwave [16,[31][32][33][34][35] frequencies, and that most of them are simply tunable SSPPs rather than programmable ones. [8,9] Hereafter, many related works have been reported based on SSPPs, [10][11][12][13][14][15][16][17][18][19][20] which have advantages of low transmission loss, highly localized fields, low crosstalk, and so on.…”