Definitions & Terminology

Symbols & Terminology

All strains in the material are constant or mechanical deformation is blocked in any direction.

Electrodes are perpendicular to 3 axis.

Relative dielectric constant (ε₃^S/ε₀).

All stresses on material are constant external forces.

Electrodes are perpendicular to 1 axis.

Relative dielectric constant (ε₁^T/ε₀).

Stress or strain is equal in all directions perpendicular to 3 axis. Electrodes are perpendicular to 3 axis.

Electromechanical coupling factor.

Stress or strain is in shear form around 2 axis.

Electrodes are perpendicular to 1 axis.

Electromechanical coupling factor

Applied stress, or the piezoelectrically induced strain in shear form around 2 axis.

Electrodes are perpendicular to 1 axis.

Piezoelectric voltage coefficient.

Applied stress, or the piezoelectrically induced strain is in the 1 direction.

Electrodes are perpendicular to 3 axis.

Piezoelectric voltage coefficient.

Hydrostatic stress or stress is applied equally in all directions. Electrodes are perpendicular to 3 axis.

Piezoelectric charge coefficient.

Applied stress, or piezoelectrically induced strain is in 3 direction.

Electrodes are perpendicular to 3 axis.

Piezoelectric charge coefficient.

Compliance is measured with closed circuit.

Stress or strain is shear around 3 direction.

Strain or stress is in 3 direction.

Elastic compliance.

Compliance is measured with open circuit.

Stress or strain is in 1 direction.

Strain or stress is in 1 direction.

Elastic compliance.