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Thesis_ Mahfuj_ Advisor Dr. Tan.pdf (33.07 MB)

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Understanding Impact Load Wave Transmission Performance of Elastic Metamaterials.

Khan, Md Mahfujul H
http://orcid.org/0000-0002-7803-0205
http://rave.ohiolink.edu/etdc/view?acc_num=akron1479146177020136

Abstract Details

2016, Master of Science, University of Akron, Mechanical Engineering.
Structures prepared by incorporating resonating endo-structures within a load bearing exo-structure mitigates dynamic load within a fixed frequency range when the wave propagates through. Their dynamic behavior can be characterized using a negative effective mass (NM) density. This research work demonstrates design, fabrication and dynamic load mitigation of an elastic metamaterial. Mass–spring system with negative effective mass is experimentally and numerically analyzed, and its transmission property is investigated in the low-frequency range. Different local resonance frequencies of the basic unit are designed by using springs having different spring constants. This work presents the use of elastic metamaterial for impact load attenuation, which is confirmed by the transmission properties in the fixed periodic system composed of such basic units. Results evidently show that impact load attenuation occurs with the presence of internal resonators at different impact energy. Parametric studies reveal that change in transmission occurs with variation in local resonance frequency of the resonators. In addition, alternating arrangements of the local resonators have negligible influence on the transmission property. A good match between numerical simulation and experiments is achieved.
Kwek Tze Tan (Advisor)
Gregory Morscher (Committee Member)
Shing-Chung Wong (Committee Member)
108 p.
Mechanical Engineering
Metamaterials; Local Resonance Frequency; Negative Effective Mass; Resonator; Transmission

Recommended Citations

Citations

  • Khan, M. M. H. (2016). Understanding Impact Load Wave Transmission Performance of Elastic Metamaterials. [Master's thesis, University of Akron]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=akron1479146177020136

    APA Style (7th edition)

  • Khan, Md Mahfujul. Understanding Impact Load Wave Transmission Performance of Elastic Metamaterials. 2016. University of Akron, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=akron1479146177020136.

    MLA Style (8th edition)

  • Khan, Md Mahfujul. "Understanding Impact Load Wave Transmission Performance of Elastic Metamaterials." Master's thesis, University of Akron, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=akron1479146177020136

    Chicago Manual of Style (17th edition)

akron1479146177020136
58
© 2016, all rights reserved.
This open access ETD is published by University of Akron and OhioLINK.