Article Details

BUCKLING ANALYSIS OF STRETCHABLE FERROELECTRIC THIN FILMONELASTOMERIC SUBSTRATES

Oleh   Zhidong Zhou [-]
Kontributor / Dosen Pembimbing : Quan Jiang
Jenis Koleksi : Buku elektronik
Penerbit : Lain-lain
Fakultas :
Subjek :
Kata Kunci : buckling, ferroelectric films, energy method, variational method
Sumber : ScienceDirect
Staf Input/Edit : Irwan Sofiyan  
File : 1 file
Tanggal Input : 2019-04-02 15:32:32

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The thin stiff films on pre-stretched compliant substrates can form wrinkles, which can be controlled in micro and nanoscale systems to generate smart structures. Recently, buck- led piezoelectric/ferroelectric nanoribbons have been reported to show an enhancement in the piezoelectric effect and stretchability, which can be applied in energy harvesting devices, sensors and memory devices instead of polymeric polyvinylidine fluoride (PVDF). This paper studies the buckling and post-buckling process of ferroelectric thin films bonded to the pre-stretched soft layer, which in turn lies on a rigid support. Nonlinear electromechanical equations for the buckling of thin piezoelectric plates are deduced and employed to model the ferroelectric film poled in the thickness direction. Two buckling modes are analyzed and discussed: partially de-adhered buck- ling and fully adhered buckling. Transition from one buckling mode to the other is predicted and the effect of piezoelectricity on the critical buckling condition of piezoelectric film is examined.