An electro-mechanical dynamic model for flexoelectric energy harvesters

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Tran Quoc Thai
  • Xiaoying Zhuang
  • Timon Rabczuk

Research Organisations

External Research Organisations

  • Tongji University
  • Bauhaus-Universität Weimar
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Details

Original languageEnglish
Pages (from-to)2183-2202
Number of pages20
JournalNonlinear dynamics
Volume111
Issue number3
Publication statusPublished - Feb 2023

Abstract

Flexoelectricity is a universal electro-mechanical coupling effect that occurs in dielectrics of all symmetric groups and becomes dominant at the micro- and nano-scales. It plays an important role in evaluating micro-electro-mechanical systems (MEMS) such as energy harvesters which convert vibrational energy to electric energy. At finer length scales, micro-inertia effects significantly contribute to the behavior of flexoelectric materials due to the mechanical dispersion. Hence, to properly characterize the vibrational behavior of MEMS, a reliable theoretical approach is required accounting for all possible phenomena that affect the output of the system such as voltage or power density. In this work, we present a consistent (dynamic) model and associated computational framework for flexoelectric structures to study the characteristics of the vibrational behavior of energy harvesters showing the dominance of the flexoelectric effect at micro- and nano-scales. In this context, we quantify the impact of the micro-inertia length scale and the flexoelectric dynamic parameter on both frequency and time responses of energy harvesters.

Keywords

    Cubic Perovskite, Dynamic flexoelectric effect, Energy harvesting, Large rotation/geometric nonlinearity, Micro inertial effect, Size dependent piezoelectricity/flexoelectricity, Strain gradient elasticity/couple stress theory

ASJC Scopus subject areas

Cite this

An electro-mechanical dynamic model for flexoelectric energy harvesters. / Thai, Tran Quoc; Zhuang, Xiaoying; Rabczuk, Timon.
In: Nonlinear dynamics, Vol. 111, No. 3, 02.2023, p. 2183-2202.

Research output: Contribution to journalArticleResearchpeer review

Thai TQ, Zhuang X, Rabczuk T. An electro-mechanical dynamic model for flexoelectric energy harvesters. Nonlinear dynamics. 2023 Feb;111(3):2183-2202. doi: 10.1007/s11071-022-07928-z
Thai, Tran Quoc ; Zhuang, Xiaoying ; Rabczuk, Timon. / An electro-mechanical dynamic model for flexoelectric energy harvesters. In: Nonlinear dynamics. 2023 ; Vol. 111, No. 3. pp. 2183-2202.
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AU - Zhuang, Xiaoying

AU - Rabczuk, Timon

N1 - Funding Information: The authors would like to thank the financial support of ERC Starting Grant (802205) and Heisenberg-Programme from DFG (ZH 459/5-1). The authors would like to thank the financial support of RISE-BESTOFRAC (734379) of Horizon 2020.

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