Abstract
This work presents test results for usable characteristics of two-layer, bending piezoelectric converters subjected to electric field and mechanical load. A general solution has been developed, based on implementation of piezoelectric segments PBS to a bent beam. Working mechanism and conditions for strain of PBS segment were determined. Basing on the general solution, for cantilever converter (of single or two PBS segments) and converter resting on two supports of one PBS segment particular solutions were developed. The resulting analytical solutions were compared with literature data, and the developed FEM solution.DOI: http://dx.doi.org/10.5755/j01.mech.22.4.12764
Highlights
Piezoelectric converters are used to measure and/or regulate a wide range of physical parameters such as force [1], strain [2], pressure [3], acceleration [4]
Comparison of the analytical solution (18) with the FEM - for cantilever converter of single PBS segment (Fig. 5) - were provided on Figs. 8 and 9
Basing on the obtained results, it was found that in case of cantilever converters better compatibility of analytical and numerical solutions was acquired when applied in the FEM modelling of the plane strain conditions, and for 271 converter resting on two supports – plane stress
Summary
Piezoelectric converters are used to measure and/or regulate a wide range of physical parameters such as force [1], strain [2], pressure [3], acceleration [4]. When designing this piezoelectric converter, specific application-adequate simultaneous equations should be defined and solved These equations bound together geometrical properties, materials properties and physical parameters, such as force, deflection and electric field. It is a very rare case that in literature there can be found particular analytical application solutions, for some groups of piezoelectric converters, in the construction of which individual components (layers) are of different length, and boundary conditions - mounting and external load - are different as compared with solution proposed by Smits For such cases, in order to determine electromechanical behaviour of the converter, most frequently the FEMbased analyses are carried out [16]. For converters of diversified material and geometric structure the FEM simulations were prepared and these were compared with the obtained analytical results
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