Flexoelectric and surface effects on a cracked piezoelectric nanobeam: Analytical resonant frequency response

• Autorzy: Bastanfar M , Hosseini S.A.H. , Sourki R. , Khosravi F.

Identyfikatory

DOI

10.24425/ame.2019.131355

• Języki publikacji: EN

Abstrakty

EN

A nanoscale beam model containing defect under the piezoelectricity considering the surface effects and flexoelectricity is established on the framework of Euler-Bernoulli theory. The governing equations of motion and related boundary conditions are derived by using Hamilton’s principle. The imperfect nanobeam is modeled by dividing the beam into two separate parts that are connected by a rotational and a longitude spring at the defect location. Analytical results on the free vibration response of the imperfect piezoelectric nanobeam exhibit that the flexoelectricity and the surface effects are sensitive to the boundary conditions, defect position, and geometry of the nanobeam. Numerical results are provided to predict the mechanical behavior of a weakened piezoelectric nanobeam considering the flexoelectric and surface effects. It is also revealed that the voltage, defect severity, and piezoelectric material have a critical role on the resonance frequency. The work is envisaged to underline the influence of surface effects and flexoelectricity on the free vibration of a cracked piezoelectric nanobeam for diverse boundary conditions. It should be mentioned, despite our R. Sourkiprevious works, an important class of piezoelectric materials used nowadays and called piezoelectric ceramics is considered in the current study.

Słowa kluczowe

EN

flexoelectricity; surface effects; imperfections; resonance frequency; nanobeam

PL

fleksoelektryczność; efekt powierzchniowy; niedoskonałość; częstotliwość rezonansowa

• Wydawca: Komitet Budowy Maszyn PAN
• Czasopismo: Archive of Mechanical Engineering
• Rocznik: 2019
• Tom: Vol. LXVI, nr 4
• Strony: 417--437
• Opis fizyczny: Bibliogr. 54 poz., rys., tab., wykr.

Twórcy

autor

Bastanfar M

• Department of Mechanical Engineering, University of Zanjan, Zanjan, Iran

autor

Hosseini S.A.H.

• Department of Industrial, Mechanical and Aerospace Engineering, Buein Zahra Technical University, Buein Zahra, Qazvin, Iran

autor

Sourki R.

• School of Engineering, The University of British Columbia, Kelowna, BC, V1V 1V7 Canada

autor

Khosravi F.

• Department of Aerospace Engineering, K.N. Toosi University of Technology, Tehran, Iran

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Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).