Electro-elastic analysis of a coated spherical piezoceramic sensor

Atashipour, Seyed Abdolrahim; Sburlati, Roberta

doi:10.1016/j.compstruct.2015.07.012

Cited by 11 publications

(4 citation statements)

References 12 publications

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“…However, the influences of the layered configuration and the applied electro-mechanical stimuli on the morphological diagram of layered DE balloons are still unknown. By analysing the electroelastic behaviour of a spherical piezoceramic sensor coated by a homogeneous protective layer, it was shown that the existence of the protective layer can prolong the effective working life of the piezoceramic sensor [30]. It is unclear whether or not this enhancement can happen in dielectric devices.…”

Section: Introductionmentioning

confidence: 99%

Tunable morphing of electroactive dielectric-elastomer balloons

Su,

Riccobelli,

Chen

et al. 2023

Proc. R. Soc. A.

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Designing smart devices with tunable shapes has important applications in industrial manufacture. In this paper, we investigate the nonlinear deformation and the morphological transitions between buckling, necking and snap-through instabilities of layered dielectric elastomer (DE) balloons in response to an applied radial voltage and an inner pressure. We propose a general mathematical theory of nonlinear electro-elasticity able to account for finite inhomogeneous strains provoked by the electro-mechanical coupling. We investigate the onsets of morphological transitions of the spherically symmetric balloons using the surface impedance matrix method. Moreover, we study the nonlinear evolution of the bifurcated branches through finite-element numerical simulations. Our analysis demonstrates the possibility to design tunable DE spheres, where the onset of buckling and necking can be controlled by geometrical and mechanical properties of the passive elastic layers. Relevant applications include soft robotics and mechanical actuators.

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Section: Introductionmentioning

confidence: 99%

Tunable morphing of electroactive dielectric-elastomer balloons

Su,

Riccobelli,

Chen

et al. 2023

Proc. R. Soc. A.

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“…While piezoceramics have high electromechanical coupling coefficients and are ideal for sensors and actuators, they suffer from inherent brittleness which makes them vulnerable in harsh environment and cyclic loading (Atashipour and Sburlati, 2016; Choi et al, 2007). Furthermore, high stress discontinuity that emerges at the interface of piezoelectric layers cause debinding of the beam (Lin and Muliana, 2015).…”

Section: Introductionmentioning

confidence: 99%

Dynamic analysis of a functionally graded piezoelectric energy harvester under magnetic interaction

Derayatifar

Chandramohan

Packirisamy

et al. 2021

Journal of Intelligent Material Systems and Structures

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The aim of this embodiment is to present an analytical analysis of a functionally graded piezoelectric energy harvester consisting of a flexible functionally graded piezoelectric layers carrying magnetic mass at the free end. The magnetic tip mass is in interaction with a permanent magnet which is located at a distance from the top of the tip mass. The oscillation of the harvester happens via excitation of the base. Using Rayleigh’s beam theory and Hamilton’s principle and considering geometric nonlinearity, the coupled electromechanical governing equations have been developed. The nonlinear frequency response of the piezoelectric energy harvester beam has also been studied under base excitation. A parametric study has been carried out to investigate the effect of grading index and magnetic force on responses of both free vibration and induced excitation cases. The results were compared with those obtained using three-dimensional finite element model developed in COMSOL Multiphysics 5.5 commercial software and good agreement has been observed. The results from both the analytical method and simulation confirm that tuning the design parameters of grading index and magnetic gap to the optimal value results in a considerable change in the performance of the energy harvester.

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“…In [15][16][17], numerical studies are presented which alter the propagation of waves through voltage-controlled deformable tubes. In [10,11,15,18,19], detailed theoretical calculations are carried out with regard to tubular transducers, the influence of their constraints and the interaction with protective coatings. The results stimulate further development of appropriate manufacturing processes for such geometries.…”

Section: Introductionmentioning

confidence: 99%

Multilayer dielectric elastomer tubular transducers for soft robotic applications

Klug

Solano‐Arana

Hoffmann

et al. 2019

Smart Mater. Struct.

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Dielectric elastomer transducers (DET) belong to the group of electroactive polymers and consist of an elastic dielectric layer laminated between two compliant electrodes. In order to reduce the driving voltage and at the same time maintain appreciable deformation, multilayer systems are common nowadays. Due to their complex manufacturing process, available transducers typically exhibit small aspect ratios in the range of 1:10–2:1 (length/diameter or height/width). Since DET have similar properties to a human muscle, it appears logical to use them in human machine interaction. Therefore, special transducer designs and an adapted dip coating fabrication method for aspect ratios higher than 16:1, which are required for soft robotic applications, are presented within this work. The polydimethylsiloxane (PDMS) raw material Elastosil 2030 (Wacker Chemie AG) and particle-based electrode blends are used to build elongated multilayer tubular transducers with up to 10 layers and 100 mm in length. Moreover, different designs and integrated stiffening elements are simulated with Ansys multiphysics FEM tool. As shown in measurements, the absolute deformation can be increased by more than 40%.

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Electro-elastic analysis of a coated spherical piezoceramic sensor

Cited by 11 publications

References 12 publications

Tunable morphing of electroactive dielectric-elastomer balloons

Tunable morphing of electroactive dielectric-elastomer balloons

Dynamic analysis of a functionally graded piezoelectric energy harvester under magnetic interaction

Multilayer dielectric elastomer tubular transducers for soft robotic applications

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