Figure 2401 thermal expansion of composite bar

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Unformatted text preview: 0 5.84 0 0 0 PZT-5A Elastic Compliance Matrix [s], 1012 m2/N −7.22 −5.74 0 0 0 16.4 18.8 −7.22 0 0 0 16.4 0 0 0 47.5 0 0 Symmetric 47.5 0 44.3 Analysis Assumptions and Modeling Notes The piezoelectric circular plate is modeled with 10 axisymmetric PLANE223 elements (Figure 237.2: “Finite Element Model of a Transducer”). The constitutive matrices used by the 2-D model are adjusted to orient the PZT-5A polarization direction along the Y axis. The electrodes are modeled by coupling the VOLT dof on the top and bottom surfaces of the plate. The resistor, inductance, and voltage source are modeled using the respective options of the CIRCU94 element. A transient analysis is performed to determine the time response of the circuit to the unit (1V) step voltage load. Numerical results are compared with an analytical solution, obtained using the Laplace transformation technique applied to an equivalent RLC-circuit, where C is the static capacitance of the piezoelectric transducer. Figure 237.2 Finite Element Model of a Transducer Y t X a 1–556 ANSYS Verification Manual . ANSYS Release 9.0 . 002114 . © SAS IP, Inc. VM237 Results Comparison VC for t @ Target ANSYS Ratio 1.8E-2s 1.5201 1.4951 0.984 4.0E-2s 0.9726 0.9974 1.026 8.8E-2s 1.4829 1.5094 1.018 1.3E-2s 1.8437 1.8022 0.978 1.86E-1s 1.8273 1.8099...
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This note was uploaded on 12/09/2010 for the course DEPARTMENT E301 taught by Professor Kulasinghe during the Spring '09 term at University of Peradeniya.

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