Electroelastic Coupled-Wave Scattering and Dynamic Stress Concentration of Piezoceramics Containing Regular N-Sided Holes

In this paper, the calculation method of dynamic stress concentration around piezoelectric ceramics containing regular n-sided holes under the action of electroelastic coupling wave was studied, and it was applied to promising barium calcium zirconate titanate material. First, electroelastic governi...

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Bibliographic Details
Published in:Actuators 2022-07, Vol.11 (7), p.202
Main Authors: Lin, Jiang, Zhou, Chuanping, Han, Xiao, Gong, Yongping, Fan, Jiawei, Bao, Junqi, Ji, Huawei, Ni, Jing, Zhou, Weihua
Format: Article
Language:English
Subjects:
Barium
Boundary conditions
Calcium zirconate
Ceramics
Correlation coefficients
Cracks
dynamic stress concentration factor
Elastic waves
Electric fields
electroelastic coupling waves
Germanium oxides
incident angle
Incident waves
Lead content
lead-free piezoelectric composites
Piezoelectric ceramics
regular polygon hole
Stress concentration
Wave functions
Wave scattering
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Summary:In this paper, the calculation method of dynamic stress concentration around piezoelectric ceramics containing regular n-sided holes under the action of electroelastic coupling wave was studied, and it was applied to promising barium calcium zirconate titanate material. First, electroelastic governing equations were decomposed by using the auxiliary function method, and the solution forms of the elastic wave field and electric field were obtained by using the wave function expansion method. Then, the triangular boundary was simplified to a circular boundary using the mapping function, and the corresponding modal coefficients were determined according to simplified boundary conditions. Finally, the dynamic stress-concentration factor was calculated to characterize the dynamic stress concentration. We performed numerical simulations with a correlation coefficient of (1 − x)[(Ba0.94Ca0.06) (Ti0.92Sn0.08)]-xSm2O3-0.06 mol% GeO2 (abbreviated as (1 − x)BCTS-xSm-0.06G). The numerical calculation results show that the incident wave number, piezoelectric properties, shape parameters of the hole, and deflection angle have a great influence on the dynamic stress around the defect, and some significant laws are summarized through analysis.
ISSN:2076-0825
2076-0825
DOI:10.3390/act11070202