Symposium F-3: Wave Phenomena in Linear and Nonlinear Metamaterials

(Dynamics and Controls)

Symposium Organizers:

K. Bertoldi, Harvard University
bertoldi@seas.harvard.edu

S. Gonella, University of Minnesota
sgonella@umn.edu

Symposium Technical Description

Mechanical metamaterials have attracted great interest in recent years because of their unique mechanical properties that exceed those displayed by conventional materials. Some of the most exciting opportunities for metamaterials research are found in the arena of wave propagation, thanks to the ability of metamaterials to induce significant spectral and spatiotemporal manipulation of acoustic and elastic waves. Phononic bandgaps, frequency-dependent directivity, anomalous refractive behavior and subwavelength waveguiding are just some of the most well-known wave manipulation effects. These properties make metamaterials ideal for a variety of engineering applications, including mechanical filtering, energy deflection and trapping and the implementation of a variety of structural logic architectures.

Recently, researchers have focused their attention on metamaterial architectures exhibiting nonlinear behavior. Nonlinearity has been exploited to make acoustic diodes and induce other symmetry breaking effects, as well as a mechanism to achieve tunability and adaptivity and to design programmable structural materials. The field of metamaterials is now rapidly stretching its potential by fully incorporating the latest advances on soft materials, origami-inspired foldable structures and coupled physics phenomena.

In this symposium we welcome contributions that discuss the latest results in acousto-elastic metamaterials research, with special emphasis on works that explore the intimate connection between physics and mechanics. We particularly encourage contributions that discuss metamaterial architectures based on nontrivial material platforms, including granular media, soft lattices, chiral topologies and bucklable and foldable cellular structures.

Technical Program

Monday | M1 10:00am-11:40am

F3-1: Advanced Nano-Manufacturing for Multi-functional Nanosystems
Room 2108 Session Chair: K. Bertoldi, S. Gonella  

Track F: Dynamics and Controls

10:00 am Harnessing dynamic buckling in soft elastic metamaterials to manage nonlinearity in the propagation, reflection and absorption of elastic waves

Vincent Tournat, Xinxin Guo, Bolei Deng, Jordan Raney, Vitalyi Gusev, Katia Bertoldi

10:20 am Harnessing geometric and magnetic nonlinearities for acoustic switching and logic

Osama R. Bilal, André G.C. Foehr, Chiara Daraio

10:40 am Wave phenomena in microscale granular crystals

Nicholas Boechler

11:00 am Linear and Nonlinear dynamic response of a liquid solid composite

Ahmed Elbanna, Qianli Chen

11:20 am Adaptively Enhanced Directivity in Nonlinear Lattice Materials

Ganesh Ramakrishnan, Stefano Gonella 

Monday | M2 13:00pm-14:40pm 

F3-2: Advanced Nano-Manufacturing for Multi-functional Nanosystems
Room 2108 Session Chair: K. Bertoldi, S. Gonella  

Track F: Dynamics and Controls

13:00 pm Unidirectional strongly nonlinear transition waves in bistable lattices

Neel Nadkarni, Andres Felipe Arrieta, Christopher Chong, Dennis M. Kochmann, Chiara Daraio

13:20 pm Sonic waves and propagating phase boundaries in bi-stable chains with stretch and twist

Prashant Kishore Purohit, Qingze Zhao

13:40 pm Wave control through soft microstructural curling: Bandgap shifting, reconfigurable anisotropy and switchable chirality

Paolo Celli, Stefano Gonella

14:00 pm Elastic wave propagation in soft microstructured materials undergoing finite strains

Stephan Rudykh, Pavel Galich

14:20 pm Band gap transmission in periodic, bistable mechanical lattices

Michael Joseph Frazier, Dennis Kochmann

 Monday | M3 15:00pm-16:40pm

F3-3: Advanced Nano-Manufacturing for Multi-functional Nanosystems
Room 2108 Session Chair: K. Bertoldi, S. Gonella  

Track F: Dynamics and Controls

15:00 pm Helical edge states and topological phase transitions in phononic systems using bi-layered lattices

Raj Kumar Pal

15:20 pm Auxetic elastic meta-structures for vibration absorption

Kathryn H Matlack, André Kissling, Antonio Palermo, Chiara Daraio

15:40 pm Linear operators for spectral analysis and design

Rose Weisburgh, Peter W. Chung

16:00 pm Metamaterial properties of periodic laminates

Ankit Srivastava