Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions
Despite the fact that the concept of incorporating Negative Stiffness (NS) elements within mechanical systems was formulated and validated more than 40 years ago, it has only recently received consistent attention. In this work, the design of a layered mechanical metamaterial having implemented NS i...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Published: |
Elsevier
2017
|
| Subjects: | |
| Online Access: | https://eprints.nottingham.ac.uk/38852/ |
| _version_ | 1848795705396690944 |
|---|---|
| author | Chronopoulos, Dimitrios Antoniadis, I. Ampatzidis, Theofanis |
| author_facet | Chronopoulos, Dimitrios Antoniadis, I. Ampatzidis, Theofanis |
| author_sort | Chronopoulos, Dimitrios |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | Despite the fact that the concept of incorporating Negative Stiffness (NS) elements within mechanical systems was formulated and validated more than 40 years ago, it has only recently received consistent attention. In this work, the design of a layered mechanical metamaterial having implemented NS inclusions is presented and its acoustic wave propagation properties are modelled. A dedicated two-dimensional periodic structure theory scheme is developed in order to compute the frequency dependent damping loss factor of the metamaterial structure. The acoustic transmission properties through the modelled panel are computed within a Statistical Energy Analysis (SEA) scheme. It is demonstrated that the suggested layered metamaterial exhibits highly superior acoustic insulation performance close and above the acoustic coincidence range, thanks to the drastic increase of its structural damping properties implied by the NS elements. Additionally, the proposed configuration presents superior performance in a broadband frequency range when compared to a viscoelastic damping constraint layer of equivalent mass. |
| first_indexed | 2025-11-14T19:36:20Z |
| format | Article |
| id | nottingham-38852 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:36:20Z |
| publishDate | 2017 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-388522020-05-04T18:43:28Z https://eprints.nottingham.ac.uk/38852/ Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions Chronopoulos, Dimitrios Antoniadis, I. Ampatzidis, Theofanis Despite the fact that the concept of incorporating Negative Stiffness (NS) elements within mechanical systems was formulated and validated more than 40 years ago, it has only recently received consistent attention. In this work, the design of a layered mechanical metamaterial having implemented NS inclusions is presented and its acoustic wave propagation properties are modelled. A dedicated two-dimensional periodic structure theory scheme is developed in order to compute the frequency dependent damping loss factor of the metamaterial structure. The acoustic transmission properties through the modelled panel are computed within a Statistical Energy Analysis (SEA) scheme. It is demonstrated that the suggested layered metamaterial exhibits highly superior acoustic insulation performance close and above the acoustic coincidence range, thanks to the drastic increase of its structural damping properties implied by the NS elements. Additionally, the proposed configuration presents superior performance in a broadband frequency range when compared to a viscoelastic damping constraint layer of equivalent mass. Elsevier 2017-04-30 Article PeerReviewed Chronopoulos, Dimitrios, Antoniadis, I. and Ampatzidis, Theofanis (2017) Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions. Extreme Mechanics Letters, 12 . pp. 48-54. ISSN 2352-4316 Mechanical Metamaterials Wave Propagation Negative Stiffness Composite Structures Damping http://www.sciencedirect.com/science/article/pii/S2352431616300487 doi:10.1016/j.eml.2016.10.012 doi:10.1016/j.eml.2016.10.012 |
| spellingShingle | Mechanical Metamaterials Wave Propagation Negative Stiffness Composite Structures Damping Chronopoulos, Dimitrios Antoniadis, I. Ampatzidis, Theofanis Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| title | Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| title_full | Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| title_fullStr | Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| title_full_unstemmed | Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| title_short | Enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| title_sort | enhanced acoustic insulation properties of composite metamaterials having embedded negative stiffness inclusions |
| topic | Mechanical Metamaterials Wave Propagation Negative Stiffness Composite Structures Damping |
| url | https://eprints.nottingham.ac.uk/38852/ https://eprints.nottingham.ac.uk/38852/ https://eprints.nottingham.ac.uk/38852/ |