Finite Element Formulation of a Piezoelectric Continuum and Performance Studies of Laminar PZT-Patch-Modules

Gall, Monika; Thielicke, Bärbel; Poizat, Christophe; Klinkel, Sven

doi:10.1557/proc-881-cc3.3

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…For piezoelectric ceramics, we consider that there is a risk of mechanical rupture if the stress in the ceramics exceeds 25 MPa. For piezocomposites, as the ceramics are pre-stressed, we consider a limit of 50 MPa [22]. The maximum stress in the bond must also be taken into account in order to avoid debonding of the actuators.…”

Section: Other Criteria For the Design Of Robust Piezoelectric De-icimentioning

confidence: 99%

Electromechanical Resonant Ice Protection Systems: Initiation of Fractures with Piezoelectric Actuators

et al. 2018

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Recent research is showing growing interest in low-power electromechanical de-icing systems and, in particular, de-icing systems based on piezoelectric actuators. These systems use the vibrations generated by piezoelectric actuators at resonance frequencies to produce shear stress at the interface between the ice and the support or to produce tensile stress in the ice. Many configurations of de-icing systems using piezoelectric actuators have been tested and showed that piezoelectric actuation may be a viable ice removal system. If the many experimental studies already achieved have the advantage to present tests in different configurations, they often lack analysis of the phenomena, which limits the optimization opportunities. This paper proposes a computational method for estimating voltages and currents of a piezoelectric de-icing system to initiate cohesive fractures in the ice or adhesive fractures at the ice/support interface. The computational method is validated by comparing numerical results with experimental results. Other contributions of this paper are the study of the types of mode (extensional or flexural) and of the frequency range with respect to de-icing performances and the proposal of some general rules for designing such systems while limiting their electric power consumption.

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Section: Other Criteria For the Design Of Robust Piezoelectric De-icimentioning

confidence: 99%

Electromechanical Resonant Ice Protection Systems: Initiation of Fractures with Piezoelectric Actuators

et al. 2018

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Fatigue lifetime study of piezoceramic patch transducers

Gall

Thielicke

2013

Acta Mech

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Life-span investigations of piezoceramic patch sensors and actuators

Gall

Thielicke

2007

Behavior and Mechanics of Multifunctional and Composite Materials 2007

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The performance and reliability of piezoceramic patches based on Lead-Zirconate-Titanate (PZT) wafers were investigated under both quasi-static and cyclic loading conditions in sensor and actuator applications. A 4-point bending setup was used to study the patches loading limits and damage behavior under mechanical tensile and compressive loading at varied strain levels. The patches performance under electric actuation was tested in a bending actuator setup. As opposed to irreversible damage by cracking of the PZT wafers under tensile loading (strain at failure: ca. 0.35 %), no mechanical damage was observed under compressive loading at strain levels of up to -0.6 %. Instead a partly reversible degradation of the piezoceramics electromechanical properties was noted. A strain-cycle diagram was established for tensile loading at room temperature. Finite-element analyses were performed using 3D material modeling with electro-mechanical coupling behavior. Very good predictability of the sensor and actuator performance was achieved by FE-simulation. Through numerical investigations the degradation of the patches sensor performance under tensile loading could be correlated to the increasing number of cracks in the PZT wafers

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Finite Element Formulation of a Piezoelectric Continuum and Performance Studies of Laminar PZT-Patch-Modules

Cited by 3 publications

References 3 publications

Electromechanical Resonant Ice Protection Systems: Initiation of Fractures with Piezoelectric Actuators

Electromechanical Resonant Ice Protection Systems: Initiation of Fractures with Piezoelectric Actuators

Fatigue lifetime study of piezoceramic patch transducers

Life-span investigations of piezoceramic patch sensors and actuators

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