Characterization of kirigami-skinned soft crawlers.

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Characterization of kirigami-skinned soft crawlers. Characterization of kirigami-skinned soft crawlers. (A) Cut shapes considered in this study. (B) Elongation of the crawlers as a function of their volume. (C) Pressure normalized by the shear modulus of actuator μa versus axial strain for the kirigami-skinned crawlers. (D and E) Friction force Ffr measured in backward and forward directions at supplied volumes (D) V/Vmax = 0 and (E) V/Vmax = 1 (with a maximum volume Vmax = 24 ml). (F to I) Effective coefficients of friction versus inflation levels in forward (hollow symbols) and backward (filled symbols) directions with (F) linear, (G) triangular, (H) circular, and (I) trapezoidal cuts. Insets: 3D-scanned surface profiles of the skins at the supplied volume V/Vmax = 1. Ahmad Rafsanjani et al. Sci. Robotics 2018;3:eaar7555 Copyright © 2018 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works