FREQUENCY- AND FIELD-DEPENDENT NON-LINEARITIES OF THE SHEAR STRAIN PIEZOELECTRIC COUPLING COEFFICIENT (D15) OF A POLED SOFT PIEZOCERAMIC MATERIAL (PZT PIC255) - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2023

FREQUENCY- AND FIELD-DEPENDENT NON-LINEARITIES OF THE SHEAR STRAIN PIEZOELECTRIC COUPLING COEFFICIENT (D15) OF A POLED SOFT PIEZOCERAMIC MATERIAL (PZT PIC255)

Résumé

This contribution investigates the non-resonant driving frequency- and AC electric field-dependent operational non-linearities of the thickness-shear strain piezoelectric coupling coefficient (d15) of poled soft piezoceramic (PZT PIC255) rectangular patches. Therefore, first, an experimental database is analyzed for varying driving frequency (10Hz-1kHz) under fixed input voltages in order to find a threshold frequency from which there is no frequencydependence and, for varying input voltages (20V-400V) under a fixed driving frequency, a threshold voltage from which there is no field-dependence is searched. Then, the Levenberg-Marquardt-Fletcher algorithm is adapted and implemented in order to optimize two-parameter additive and multiplicative power laws for modelling the field-dependent non-linearity of soft piezoceramics. It is found that, while the additive power law is slower than the multiplicative one, they perform similarly for wide ranges of driving frequency (200Hz-1kHz) and actuation voltage (100V-400V). Besides, their two parameters are found frequency-dependent.

Dates et versions

hal-04486242 , version 1 (01-03-2024)

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Ayech Benjeddou. FREQUENCY- AND FIELD-DEPENDENT NON-LINEARITIES OF THE SHEAR STRAIN PIEZOELECTRIC COUPLING COEFFICIENT (D15) OF A POLED SOFT PIEZOCERAMIC MATERIAL (PZT PIC255). 10th ECCOMAS Thematic Conference on Smart Structures and Materials, Dimitris A. Saravanos, Ayech Benjeddou, Jul 2023, Patras, France. pp.1996-2007, ⟨10.7712/150123.9968.473594⟩. ⟨hal-04486242⟩
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