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SHOCK MITIGATION AND WAVE CONTROL USING ELASTIC METAMATERIAL STRUCTURES

Alamri, Sagr Mubarak
http://rave.ohiolink.edu/etdc/view?acc_num=akron154177943169993

Abstract Details

2018, Doctor of Philosophy, University of Akron, Mechanical Engineering.
Acoustic/Elastic metamaterials have attracted increased attention in recent times. Metamaterials are defined as special materials that exhibit unusual properties not normally found in normal materials. These unusual properties are derived from the specially designed microstructures rather than the chemical composition of the material. Based on the concept of locally resonant metamaterials, these materials are applied in many applications such as impact wave attenuation, blast wave mitigation and wave control and manipulation due to their flexibility and tailoring properties for various needed applications. In this thesis, we present the development of a dissipative elastic metamaterial with multiple Maxwell-type resonators for dynamic load mitigation. Besides the wave attenuation of dynamic loads, we also investigate the asymmetric transmission of elastic waves which has recently been realized by linear structures. We design and propose different diatomic and triatomic elastic metamaterials to obtain large asymmetric elastic wave transmission in multiple low-frequency bands. All these frequency bands can be theoretically predicted to realize one-way wave propagation along different directions of transmission. All proposed models in this research are analytically investigated and numerically verified by both analytical lattice and continuum models. Also, the dynamic responses of the proposed models are explored and analyzed in time and frequency domains. The effect of damping on the proposed models is also investigated for more practical applications. Lastly, experimental verification is further conducted to observe wave asymmetric transmission bands and transient wave responses in time and frequency domains are also explored.
KWEK-TZE TAN, PHD (Advisor)
GRAHAM KELLY, PHD (Committee Member)
GREGORY MORSCHER, PHD (Committee Member)
PING YI, PHD (Committee Member)
MALENA ESPANOL, PHD (Committee Member)
150 p.
Mechanical Engineering
ELASTIC METAMATERIAL; ACOUSTIC METAMATERIAL; DYNAMIC LOAD MITIGATION; ASYMMETRIC WAVE; FREQUENCY BANDGAP; WAVE ATTENUATION; DISSIPATIVE METAMATERIAL;

Recommended Citations

Citations

  • Alamri, S. M. (2018). SHOCK MITIGATION AND WAVE CONTROL USING ELASTIC METAMATERIAL STRUCTURES [Doctoral dissertation, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron154177943169993

    APA Style (7th edition)

  • Alamri, Sagr. SHOCK MITIGATION AND WAVE CONTROL USING ELASTIC METAMATERIAL STRUCTURES. 2018. University of Akron, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron154177943169993.

    MLA Style (8th edition)

  • Alamri, Sagr. "SHOCK MITIGATION AND WAVE CONTROL USING ELASTIC METAMATERIAL STRUCTURES." Doctoral dissertation, University of Akron, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=akron154177943169993

    Chicago Manual of Style (17th edition)

akron154177943169993
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© 2018, some rights reserved.Creative Commons License SHOCK MITIGATION AND WAVE CONTROL USING ELASTIC METAMATERIAL STRUCTURES by Sagr Mubarak Alamri is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. Based on a work at etd.ohiolink.edu.
This open access ETD is published by University of Akron and OhioLINK.