Publications by Year: 2017

Buckling-Induced Kirigami
Rafsanjani A, Bertoldi K. Buckling-Induced Kirigami. Physical Review Letters. 2017;118 :084301. [pdf] [movies] [cover]
Wang Z, Polygerinos P, Overvelde JTB, Galloway KC, Bertoldi K, Walsh CJ. Interaction Forces of Soft Fiber Reinforced Bending Actuators. IEEE/ASME Transactions on Mechatronics. 2017. [pdf]
Wang P, Zheng Y, Fernandes MC, Sun Y, Xu K, Sun S, Kang SH, Tournat V, Bertoldi K. Harnessing Geometric Frustration to Form Band Gaps in Acoustic Networks. Physical Review Letters [Internet]. 2017;118 (8) :084302. Publisher's VersionAbstract

We demonstrate both numerically and experimentally that geometric frustration in two-dimensional periodic acoustic networks consisting of arrays of narrow air channels can be harnessed to form band gaps (ranges of frequency in which the waves cannot propagate in any direction through the system). While resonant standing wave modes and interferences are ubiquitous in all the analyzed network geometries, we show that they give rise to band gaps only in the geometrically frustrated ones (i.e., those comprising of triangles and pentagons). Our results not only reveal a new mechanism based on geometric frustration to suppress the propagation of pressure waves in specific frequency ranges but also open avenues for the design of a new generation of smart systems that control and manipulate sound and vibrations.

Overvelde JTB, Weaver JC, Hoberman C, Bertoldi K. Rational design of reconfigurable prismatic architected materials. Nature. 2017;541 :347-352. [pdf] [movies] [matlab code] [News&Views]
Connolly F, Walsh CJ, Bertoldi K. Automatic design of fiber-reinforced soft actuators for trajectory matching. Proceedings of the National Academy of Sciences of the United States of America. 2017;114 :51-56. [pdf] [movies]