Evaluation of the properties of 1-3 piezocomposites of a new lead titanate in epoxy resins

Ting, Robert Y.; Shaulov, A.; Smith, W.A.

doi:10.1080/00150199208009073

Cited by 7 publications

(1 citation statement)

References 8 publications

(6 reference statements)

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“…The white regions denote void (phase 0), the filled regions consist of Invar (phase 1) and the cross-hatched regions consist of nickel (phase 2). of piezoelectric rods in solid polymer matrices have been tested experimentally in [55,43,56]. Using simple models in which the elastic and electric fields were taken to be uniform in the different phases, Haun and Newnham [57], Chan and Unsworth [58] and Smith [44] qualitatively explained the enhancement due to the Poisson ratio effect.…”

Section: Piezocomposite Designmentioning

confidence: 99%

Design of smart composite materials using topology optimization

Sigmund

Torquato

1999

Smart Mater. Struct.

165

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The topology optimization method is used to find the distribution of material phases that extremizes an objective function (e.g., thermal expansion coefficient, piezoelectric coefficients etc) subject to constraints, such as elastic symmetry and volume fractions of the constituent phases, within a periodic base cell. The effective properties of the material structures are found using a numerical homogenization method based on a finite-element discretization of the base cell. The optimization problem is solved using sequential linear programming. We review the topology optimization procedure as a tool for smart materials design and discuss in detail two recent applications of it to design composites with extreme thermal expansion coefficients and piezocomposites with optimal hydrophone characteristics.

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Section: Piezocomposite Designmentioning

confidence: 99%

Design of smart composite materials using topology optimization

Sigmund

Torquato

1999

Smart Mater. Struct.

165

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Smart Ferroelectric Ceramic/Polymer Composite Sensors

Das-Gupta¹

2000

Polymer Sensors and Actuators

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Design of 1-3 piezocomposite hydrophones using finite element analysis

Bennett

Hayward

1997

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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The 1-3 piezocomposite material was originally developed because of its perceived good performance under hydrostatic operating conditions. Several constrained-dimensional models for piezocomposite hydrophones have been proposed but were found to lack accuracy when compared with experimental data. In addition, they could not be easily extended to include the effect of ancillary components such as cover plates, on the transducer behavior. In this work a finite element model is used for modelling of 1-3 piezocomposite hydrophones to help overcome these two shortfalls. A finite element model initially developed for modelling of thickness mode operation has been extended to include lateral pressures typical of the hydrostatic environment. The response of the new model has been compared with experiment with satisfactory results, allowing an extensive set of simulations to be presented for comprehensive evaluation of 1-3 piezocomposite design as an actuator or a hydrophone. The best hydrostatic performance was obtained by using a low volume fraction composite of PZT-5H and a soft compressible polymer, with potential enhancements by the incorporation of stiff cover plates covering the ceramic pillars. It is shown that the aspect ratio of the ceramic pillars should be minimized to maximize stress transfer. Additionally, ceramic pillar shape and distribution do not exert a major influence on the hydrostatic behavior.

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Evaluation of the properties of 1-3 piezocomposites of a new lead titanate in epoxy resins

Cited by 7 publications

References 8 publications

Design of smart composite materials using topology optimization

Design of smart composite materials using topology optimization

Smart Ferroelectric Ceramic/Polymer Composite Sensors

Design of 1-3 piezocomposite hydrophones using finite element analysis

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