Studies on dynamic behavior of composite and isotropic cylindrical shells with PZT layers under axisymmetric temperature variation

Wave propagation characteristics in piezoelectric cylindrical laminated shells under large deformation

Abstract: An analytical method for wave propagation in piezoelectric cylindrical laminated shells under large deformations is presented in this article. Based on the minimum potential energy variational method (Hamilton’s principle), the nonlinear dynamic governing equation of piezoelectric cylindrical laminated shells is derived. Through solving an eigenvalue problem, the wave characteristics curves of waves numbers and waves velocity are described. In example calculations, the four types of piezoelectric cylindrical laminated shells with stacking sequences [PZT-4/aluminum], [PZT-4/fiber-layer/PVDF], [PZT-4/aluminum/fiber-layer/aluminum/PVDF] and [aluminum/fiber-layer/aluminum] are taken, respectively. Here, the analysis is equally applicable to other types of piezoelectric cylindrical laminated shells. The effects of large deformation, stacking sequences and piezoelectric layers on wave propagation in cylindrical laminated shells are obtained and discussed. This solution method may be used as a reference to investigate wave propagation in piezoelectric cylindrically laminated shells under large deformation and rotary inertia for various stacking sequences and materials layers by using other methods. The results carried out can be used in the ultrasonic inspection techniques and health monitoring for piezoelectric laminated structures.

Influences of large deformation and rotary inertia on wave propagation in piezoelectric cylindrically laminated shells in thermal environment

Abstract: Influences of large deformation (geometrical non-linear) and rotary inertia on wave propagation in a long, piezoelectric cylindrically laminated shell in thermal environment is presented in this paper. Nonlinear dynamic governing equations of piezoelectric cylindrically laminated shells are derived by means of Hamilton’s principle. The wave propagation modes are obtained by solving an eigenvalue problem. Numerical examples show that the characteristics of wave propagation in piezoelectric cylindrically laminated shells are relates to the large deformation, rotary inertia and thermal environment of the piezoelectric cylindrically laminated shells. The effect of large deformation, rotary inertia and thermal load on wave propagation in the piezoelectric cylindrically laminated shells is discussed by comparing with the result from the small deformation (geometrical linear shell theory). This method may be used to investigate wave propagation in various laminated material, layers numbers and thickness of piezoelectric cylindrically laminated shells under large deformation. The results carried out can be used in the ultrasonic inspection techniques and structural health monitoring.

Guide to the Literature of Piezoelectricity and Pyroelectricity. 25

Abstract: A bibliography is given containing 1527 references published during 2003 and 2004 on piezoelectric and pyroelectric properties of materials and their applications. It contains listings of journal articles and patents with complete bibliographic citations. The year 2003 references complete the 2003 references in Guides 23 and 24 (published previously in this series). Journal and patent references from 2004 in which the first author's name begins with letters between A and K are given in the current guide. Journal articles and patents by authors with names beginning with the letters L through Z will be published in Guide 26. This bibliography is the continuation of a series published semi-annually.

On dispersion relations in smart laminated fiber-reinforced composite membranes considering different piezoelectric coupling effects:

Abstract: Wave propagation characteristics are determined for smart laminated fiber-reinforced composite cylindrical membrane shells with different piezoelectric coupling effects. Wave motion equations are d...

The Effect of Transverse Shear, Rotary Inertia on Wave Propagation in Laminated Piezoelectric Cylindrical Shells in Thermal Environment:

Abstract: The effects of transverse shear, rotary inertia and thermal loads on wave propagation in orthotropic laminated piezoelectric cylindrical shells are studied in this paper. A dynamic model of laminated piezoelectric cylindrical shell is derived based on Cooper-Naghdi shell theory. The wave characteristics curves are obtained by solving an eigenvalue problem. Besides discussing the dispersion curves for different wave modes, effects of layer numbers, the thickness of piezoelectric layers and thermal environment on the wave characteristics curves were also studied. This solution method is validated by the classical solution of an elastic shell, and may be used to investigate wave propagation in laminated piezoelectric cylindrical shells with various laminated materials, layer numbers and thickness, in thermal environment.

Concepts and Applications of Finite Element Analysis

Abstract: Notation. Introduction. One-Dimensional Elements, Computational Procedures. Basic Elements. Formulation Techniques: Variational Methods. Formulation Techniques: Galerkin and Other Weighted Residual Methods. Isoparametric Elements. Isoparametric Triangles and Tetrahedra. Coordinate Transformation and Selected Analysis Options. Error, Error Estimation, and Convergence. Modeling Considerations and Software Use. Finite Elements in Structural Dynamics and Vibrations. Heat Transfer and Selected Fluid Problems. Constaints: Penalty Forms, Locking, and Constraint Counting. Solid of Revolution. Plate Bending. Shells. Nonlinearity: An Introduction. Stress Stiffness and Buckling. Appendix A: Matrices: Selected Definition and Manipulations. Appendix B: Simultaneous Algebraic Equations. Appendix C: Eigenvalues and Eigenvectors. References. Index.

Piezoelectric Shells: Distributed Sensing and Control of Continua

Abstract: Piezoelectric shell vibration theory common piezoelectric continua and active piezoelectric structures distributed sensing and control of elastic shells multi-layered shell actuators boundary control of beams distributed control of plates with segmented sensors and actuators convolving shell sensors and actuators applied to rings sensing and control of cylindrical shells finite element formulation and analyses. Appendix: linear piezoelectricity theory.

Active control of FGM plates with integrated piezoelectric sensors and actuators

Abstract: In this paper, a finite element formulation based on the classical laminated plate theory is presented for the shape and vibration control of the functionally graded material (FGM) plates with integrated piezoelectric sensors and actuators. The properties of the FGM plates are functionally graded in the thickness direction according to a volume fraction power law distribution. A constant velocity feedback control algorithm is used for the active control of the dynamic response of the FGM plate through closed loop control. The static and dynamic responses are presented in both tabular and graphical forms for an FGM plate of aluminum oxide/Ti–6A1–4V material composition. The effects of the constituent volume fractions and the influence of feedback control gain on the static and dynamic responses of FGM plates are examined.

Equations of high frequency vibrations of thermopiezoelectric crystal plates

Abstract: A system of two-dimensional equations is derived for high frequency motions of crystal plates accounting for coupling of mechanical, electrical and thermal fields.