Coupled flexural-longitudinal waves in an origami metamaterial with uncoupled creases
Journal
Physics Letters, Section A: General, Atomic and Solid State Physics
Journal Volume
396
Start Page
127232
ISSN
03759601
Date Issued
2021
Author(s)
Abstract
Wave coupling exists in asymmetrical structures. In this work, we numerically and experimentally study wave coupling behaviors in one-dimensional origami metamaterials with uncoupled creases. Unlike conventional one-dimensional asymmetrical structures, the coupling characteristics in origami structures can be tuned and rich bandgap regulation can be achieved. By utilizing wave coupling, new flexural-wave bandgaps can be opened and shaped by folding. We propose a coupling ratio to explain different wave coupling phenomena with respect to the folding angles and structure parameters. Based on a proper realization of the creases and with two orthogonal fiber Bragging grating (FBG) displacement sensors, several experiments are performed to support our arguments on wave-coupling behaviors. Through this research, we also provide a systematic analyzing approach and an experimental method in studying coupling waves. Despite focusing on the crease-uncoupled origami structures, the provided multi-dimensional sensing technique enables one to study general origami metamaterials with coupled creases.
Subjects
Bandgaps
Elastic Metamaterials
Origami
Wave Coupling
Energy Gap
Fiber Bragg Gratings
Asymmetrical Structures
Coupling Characteristic
Displacement Sensor
Experimental Methods
Longitudinal Waves
Multi Dimensional
Sensing Techniques
Structure Parameter
Metamaterials
Publisher
Elsevier B.V.
Type
journal article