Elastic wave tailoring at the macro/micro/nano- scales using intentional strongly nonlinear coupling
type: CreativeWork
description: In acoustics, wave tailoring refers to the manipulation of the propagation of waves or energy that are generated due to some form of dynamic loading. It includes real world examples ranging from impact mitigation to sensors and communication applications and is typically accomplished through the design of material properties. There are two approaches to designing materials for wave tailoring: the first is to develop new materials by tailoring their atomic structure—for example metallic alloys, ceramic crystals and polymers. The second approach, adopted in this work, is to build “metamaterials” using the existing materials as building blocks and leveraging local architecture to develop new engineered materials with extraordinary properties. The properties of metamaterials can be controlled by treating local architecture and local material properties as optimizable design parameters to exploit their “coupled” behavior to achieve properties and behaviors that cannot be found in nature and often surpass the physical limits imposed by the atomic structure of materials. Nonlinearity, especially strong nonlinearity, introduces additional dynamics that are not accessible in the linear dynamic regime such as frequency-amplitude dependence, sudden transitions (jumps), bifurcations, saturation effects, internal resonances, and chaos. In this work we harness this nonlinear behavior in the form of nonlinear coupling in acoustic waveguides. Common methods of achieving strongly nonlinear behavior are reviewed and a novel class of nonlinear 2D materials is developed and characterized revealing that it is highly tunable and can robustly produce various nonlinear behaviors including strongly softening and strongly stiffening regimes. Importantly, the design readily lends itself to scalable manufacturing processes on both the macro and micro/nanoscales. Wave tailoring applications of nonlinear interactions are studied—for example, micro-granular contact interactions in 1D granular cry…
abstract: In acoustics, wave tailoring refers to the manipulation of the propagation of waves or energy that are generated due to some form of dynamic loading. It includes real world examples ranging from impact mitigation to sensors and communication applications and is typically accomplished through the design of material properties. There are two approaches to designing materials for wave tailoring: the first is to develop new materials by tailoring their atomic structure—for example metallic alloys, ceramic crystals and polymers. The second approach, adopted in this work, is to build “metamaterials” using the existing materials as building blocks and leveraging local architecture to develop new engineered materials with extraordinary properties. The properties of metamaterials can be controlled by treating local architecture and local material properties as optimizable design parameters to exploit their “coupled” behavior to achieve properties and behaviors that cannot be found in nature and often surpass the physical limits imposed by the atomic structure of materials. Nonlinearity, especially strong nonlinearity, introduces additional dynamics that are not accessible in the linear dynamic regime such as frequency-amplitude dependence, sudden transitions (jumps), bifurcations, saturation effects, internal resonances, and chaos. In this work we harness this nonlinear behavior in the form of nonlinear coupling in acoustic waveguides. Common methods of achieving strongly nonlinear behavior are reviewed and a novel class of nonlinear 2D materials is developed and characterized revealing that it is highly tunable and can robustly produce various nonlinear behaviors including strongly softening and strongly stiffening regimes. Importantly, the design readily lends itself to scalable manufacturing processes on both the macro and micro/nanoscales. Wave tailoring applications of nonlinear interactions are studied—for example, micro-granular contact interactions in 1D granular cry…
author: Bunyan, Jonathan
language: en
keywords: wave tailoring, nanoscale, acoustic, nonlinearity, architectured materials, nonlinear materials, nonreciprocity
date published: 2020-03-02T21:58:04Z
date modified: 2026-07-22T22:24:45Z
provider: University of Illinois - Urbana-Champaign
publisher: Networked Digital Library of Theses and Dissertations
type: WebPage
source organization: University of Illinois at Urbana-Champaign

PropertyValue
property ID: Handle
value: http://hdl.handle.net/2142/106171