By Jiashi Yang

This quantity is meant to supply researchers and graduate scholars with the elemental points of the continuum modeling of electroelastic interactions in solids. A concise remedy of linear, nonlinear, static and dynamic theories and difficulties is gifted. The emphasis is on formula and realizing of difficulties important in equipment functions instead of resolution options of mathematical difficulties. the maths utilized in this e-book is minimum. This quantity is appropriate for a one-semester graduate direction on electroelasticity. it will probably even be used as a reference for graduate scholars and researchers in mechanics and acoustics.

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An introduction to the theory of piezoelectricity

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3-1. Calculate the stress in a plate capacitor by studying the Coulomb force between charges at the two major surfaces of the plate. 3-2. 3-23). 3-3. Show that 4. 1-49) has been used. Use the divergence theorem 19 which implies that where and (a scalar) defined by are the reference or material electric displacement and body free change per unit undeformed volume. From Equation which implies that where defined by is the reference electric field. From the total mass of the material body is a constant, which is the mass in the reference state where is the mass density in the reference state.

7. 7-1. 7-6). 8. TOTAL STRESS FORMULATION A more compact formulation will result if we introduce the following total energy density: Then the constitutive relations take the following form: where we have introduced a total stress tensor in material form. 7-1) becomes The following expressions will be useful in Chapter 6. 29 Chapter 2 LINEAR PIEZOELECTRICITY FOR INFINITESIMAL FIELDS In this chapter we specialize the nonlinear equations in Chapter 1 to the case of infinitesimal deformations and fields, which results in the linear theory of piezoelectricity.

For boundary conditions we consider the following partitions of S: where is the part of S on which the mechanical displacement is prescribed, and is the part of S where the traction vector is prescribed. represents the part of S which is electroded where the electric potential is no more than a function of time, and is the unelectroded part. For mechanical boundary conditions we have prescribed displacement and prescribed traction Electrically, on the electroded portion of S, where does not vary spatially.

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