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Application of Smart Materials in Energy Harvesting and Wave Propagation
Başlık:
Application of Smart Materials in Energy Harvesting and Wave Propagation
Yazar:
Ansari, Mohammad Hossein, author. (orcid)0000-0003-1628-6077
ISBN:
9780438049734
Yazar Ek Girişi:
Fiziksel Tanımlama:
1 electronic resource (148 pages)
Genel Not:
Source: Dissertation Abstracts International, Volume: 79-10(E), Section: B.
Advisors: M. Amin Karami Committee members: Ehsan Esfahani; Mostafa Nouh; Tarunraj Singh.
Özet:
This work studies two main applications for smart materials; Energy harvesting and wave propagation. For the first application, we look at utilization of piezoelectric materials in generating electricity at small scale and from low frequency excitation. First, the energy harvesting at small scale for biomedical applications is studied. Two different novel configurations, one linear and one nonlinear, are proposed to achieve the goals for an energy harvester in implantable biomedical devices such as pacemakers. The goals include but not limited to satisfying the size limitations, MRI compatibility, sufficient power output, reliability, and robustness. The proposed devices are designed and optimized to convert the heartbeat vibrations to the electricity needed for conventional and modern leadless pacemakers. The energy harvesters are modeled and the electromechanical coupled equations are solved analytically. The results are verified using experimental test results.
Moreover, the energy harvesting from controlled buckling of piezoelectric beams is studied. The goal is to achieve high power output from low frequency excitation such as human walking or passing cars. A mechanism is proposed to use controlled buckling for maximizing the power and preventing the beam from fracture due to buckling. The device could be used as a shoe energy harvester or as an energy harvester on roads. The generated electricity could be used to power portable devices such as cell phones and sensors on roads.
Another application of smart materials is studied in this work to achieve nonreciprocal wave propagation. Metamaterial Terfenol-D and a linear induction motor mechanism are proposed to achieve nonreciprocity in a rod by changing the modulus of elasticity in space and time. The governing equations of the system are studied and a modified transfer matrix method is derived to calculate the transfer function of the rod.
Notlar:
School code: 0656
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Yer Numarası | Demirbaş Numarası | Shelf Location | Lokasyon / Statüsü / İade Tarihi |
---|---|---|---|
XX(682021.1) | 682021-1001 | Proquest E-Tez Koleksiyonu | Arıyor... |
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