Elastic metamaterials utilize locally resonant mechanical elements to onset band gap characteristics that are typically exploited in vibration suppression and isolation applications. The present work employs a comprehensive structural intensity analysis (SIA) to depict the structural power distribution and variations associated with band gap frequency ranges, as well as outside them along both dimensions of a two-dimensional (2D) metamaterial. Following a brief theoretical dispersion analysis, the actual mechanics of a finite metamaterial plate undergoing flexural loading and consisting of a square array of 100 cells is examined experimentally using a fabricated prototype. Scanning laser Doppler vibrometer (SLDV) tests are carried out to experimentally measure the deformations of the metamaterial in response to base excitations within a broad frequency range. In addition to confirming the attenuation and blocked propagation of elastic waves throughout the elastic medium via graphical visualizations of power flow maps, the SIA reveals interesting observations, which give additional insights into energy flow and transmission in elastic metamaterials as a result of the local resonance effects. A drastic reduction in power flow magnitudes to the bulk regions of the plate within a band gap is noticeably met with a large amplification of structural intensity around and in the neighborhood of the excitation source as a compensatory effect. Finally, the theoretical and experimentally measured streamlines of power flow are presented as an alternative tool to predict the structural power patterns and track vortices as well as confined regions of energy concentrations.
Skip Nav Destination
Article navigation
April 2018
Research-Article
Experimental Evaluation of Structural Intensity in Two-Dimensional Plate-Type Locally Resonant Elastic Metamaterials
H. Al Ba'ba'a,
H. Al Ba'ba'a
Mechanical and Aerospace
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
Search for other works by this author on:
M. A. Attarzadeh,
M. A. Attarzadeh
Mechanical and Aerospace
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
Search for other works by this author on:
M. Nouh
M. Nouh
Mechanical and Aerospace
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
e-mail: mnouh@buffalo.edu
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
e-mail: mnouh@buffalo.edu
Search for other works by this author on:
H. Al Ba'ba'a
Mechanical and Aerospace
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
M. A. Attarzadeh
Mechanical and Aerospace
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
M. Nouh
Mechanical and Aerospace
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
e-mail: mnouh@buffalo.edu
Engineering Department,
University at Buffalo (SUNY),
Buffalo, NY 14260
e-mail: mnouh@buffalo.edu
1Corresponding author.
Contributed by the Applied Mechanics Division of ASME for publication in the JOURNAL OF APPLIED MECHANICS. Manuscript received November 8, 2017; final manuscript received January 11, 2018; published online February 2, 2018. Assoc. Editor: Yihui Zhang.
J. Appl. Mech. Apr 2018, 85(4): 041005 (9 pages)
Published Online: February 2, 2018
Article history
Received:
November 8, 2017
Revised:
January 11, 2018
Citation
Al Ba'ba'a, H., Attarzadeh, M. A., and Nouh, M. (February 2, 2018). "Experimental Evaluation of Structural Intensity in Two-Dimensional Plate-Type Locally Resonant Elastic Metamaterials." ASME. J. Appl. Mech. April 2018; 85(4): 041005. https://doi.org/10.1115/1.4039042
Download citation file:
Get Email Alerts
Related Articles
Two-Dimensional In-Plane Elastic Waves in Curved-Tapered Square Lattice Frame Structure
J. Appl. Mech (March,2022)
On a Nonlinear Locally Resonant Metamaterial With Resistance-Inductance Shunt
J. Comput. Nonlinear Dynam (May,2024)
Negative Effective Mass Density of One-Dimensional Hierarchical Metacomposite
J. Appl. Mech (March,2015)
Band-Gap Properties of Elastic Metamaterials With Inerter-Based Dynamic Vibration Absorbers
J. Appl. Mech (July,2018)
Related Proceedings Papers
Related Chapters
Smart Semi-Active Control of Floor-Isolated Structures
Intelligent Engineering Systems Through Artificial Neural Networks, Volume 17
Fluidelastic Instability of Tube Bundles in Single-Phase Flow
Flow-Induced Vibration Handbook for Nuclear and Process Equipment
Achievements, Challenges, and Opportunities
Computer Vision for Structural Dynamics and Health Monitoring