FIGURE 4.

Transition effects on reconfigurability. (A) A spatially graded slab (unit cells vary in the horizontal direction) with dimensions l = 10h having linearly varying values of the open-state strain energy (B) along its length. (C) When impacted, the structure reveals a smoothly accelerating transition in the x-t-diagram of the center line, with three snapshots of the reconfiguration shown in (D). (E) A tuning fork-like structure (l = 12h) made from two distinct underlying architectures (color code matches with curves in (F)) and a rigid defect demonstrating OR logic (G). (H) A comb-like structure (l = 10h) made from multiple distinct underlying unit cells (color code matches with curves in (I)), which enables careful control of the delay between signals propagating in figures (J) and temporal programming of the signal arrival at the right end of the structure (K). (L) A rectangular structure (l = 8h) with alternating unit cell gradients along the length and smooth gradients along the width (color code matching the energy densities in (M); eight layers along the width and four layers between each section along the length). (N) When impacted, the structure undergoes serpentine locomotion. (All results for $\beta /\text{Δ}t=0.2\mathrm{MPa}$ and $\mu =1\mathrm{MPa}$.)