IDEAS home Printed from https://ideas.repec.org/a/eee/energy/v191y2020ics0360544219322558.html
   My bibliography  Save this article

Electromechanical model of layered flexoelectric energy harvesters with strain gradient effect

Author

Listed:
  • Wang, K.F.
  • Wang, B.L.
  • Li, J.E.

Abstract

Small size wireless devices entirely self-sufficient through energy harvesting from their local surroundings have wide applications. In this paper, an analytical model incorporating the effect of strain gradient for nanoscale flexoelectric energy harvesters is developed. The approximate closed-form solution of voltage output, which can provide a quick assessment of the efficiency of nanoscale flexoelectric energy harvesters, is provided. It is found that the optimal load resistance is not sensitive to the effects transverse shearing and strain gradient. For example, the optimal load resistances are 6.6 MΩ, 6.5 MΩ and 6.3 MΩ for the characteristic length scales are choses as 0 nm, 25 nm and 50 nm, respectively. The effect of transverse shearing on power output is more significant for a nanoscale flexoelectric energy harvester with smaller length to thickness ratio and larger proof mass. For example, power outputs predicted by Euler beam model are 17.6%, 3.8% and 0.06% higher than these predicted by Timoshenko beam model for the length to thickness ratios are 5, 10 and 20, respectively. In addition, the effect of strain gradient enhances the frequency therefore reduces the power output of the beam. The present model may be helpful for mechanical engineers and materials scientists for designing high-performance nanoscale flexoelectric energy harvesters.

Suggested Citation

  • Wang, K.F. & Wang, B.L. & Li, J.E., 2020. "Electromechanical model of layered flexoelectric energy harvesters with strain gradient effect," Energy, Elsevier, vol. 191(C).
  • Handle: RePEc:eee:energy:v:191:y:2020:i:c:s0360544219322558
    DOI: 10.1016/j.energy.2019.116560
    as

    Download full text from publisher

    File URL: http://www.sciencedirect.com/science/article/pii/S0360544219322558
    Download Restriction: Full text for ScienceDirect subscribers only

    File URL: https://libkey.io/10.1016/j.energy.2019.116560?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    As the access to this document is restricted, you may want to search for a different version of it.

    References listed on IDEAS

    as
    1. Qi, Lu, 2019. "Energy harvesting properties of the functionally graded flexoelectric microbeam energy harvesters," Energy, Elsevier, vol. 171(C), pages 721-730.
    2. Wang, K.F. & Wang, B.L., 2018. "Energy gathering performance of micro/nanoscale circular energy harvesters based on flexoelectric effect," Energy, Elsevier, vol. 149(C), pages 597-606.
    Full references (including those not matched with items on IDEAS)

    Most related items

    These are the items that most often cite the same works as this one and are cited by the same works as this one.
    1. Qi, Lu, 2019. "Energy harvesting properties of the functionally graded flexoelectric microbeam energy harvesters," Energy, Elsevier, vol. 171(C), pages 721-730.
    2. Shi, Shuanhu & Li, Peng & Jin, Feng, 2019. "Thermal-mechanical-electrical analysis of a nano-scaled energy harvester," Energy, Elsevier, vol. 185(C), pages 862-874.
    3. Fan, Chengliang & Li, Hai & Zhang, Zutao & Pan, Yajia & Wu, Xiaoping & Ahmed, Ammar, 2023. "An H-shaped coupler energy harvester for application in heavy railways," Energy, Elsevier, vol. 270(C).
    4. Ghodsi, Ali & Jafari, Hamid & Azizi, Saber & Ghazavi, Mohammad Reza, 2020. "On the dynamics of a novel energy harvester to convert the energy of the magnetic noise into electrical power," Energy, Elsevier, vol. 207(C).

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:eee:energy:v:191:y:2020:i:c:s0360544219322558. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    If CitEc recognized a bibliographic reference but did not link an item in RePEc to it, you can help with this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Catherine Liu (email available below). General contact details of provider: http://www.journals.elsevier.com/energy .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.