Piezoelectric materials experience stresses due to voltage differences. To properly use a composite material, the material axes must be defined in the Element Definition dialog. The piezoelectric material properties are listed below. Depending on the element type, analysis type and loads, not all the material properties may be required. In addition to these properties, it may be necessary to define some Isotropic Material Properties.
This is the value of the modulus of elasticity in the direction in which the material is polarized. The modulus of elasticity is the slope of the stress versus strain curve of a material until the proportionality limit. It is also referred to as the Young's modulus of a material. The polarization of the piezoelectric material is assumed to be along the local 3 direction of the material. This is only applicable for the piezoelectric material model. This is required for all structural analyses.
This is the value of the modulus of elasticity in the transverse direction of the material. The modulus of elasticity is the slope of the stress versus strain curve of a material until the proportionality limit. It is also referred to as the Young's modulus of a material. The piezoelectric material model assumes equivalent properties along the local 1 and 2 directions transverse to the polarization direction. This is only applicable for the piezoelectric material model. This is required for all structural analyses.
The transverse charge coefficient, d31, is the ratio of the strain induced in the local 1 direction divided by the applied electric field in the local 3 direction, the direction of polarization. This is only applicable for the piezoelectric material model. This is required for all structural analyses.
The longitudinal charge coefficient, d33, is the ratio of the strain induced in the local 3 direction divided by the applied electric field in the local 3 direction, the direction of polarization. This is only applicable for the piezoelectric material model. This is required for all structural analyses.
The shear charge coefficient, d15, is the ratio of the induced shear strain divided by the applied electric field in the local 1 direction, perpendicular to the direction of polarization. This is only applicable for the piezoelectric material model. This is required for all structural analyses.
You can manually define the 21 elastic coefficients of the stiffness matrix. The coefficients are all input in the local direction. This is only applicable for the general piezoelectric material model. This is required for all structural analyses.
The piezoelectric matrix relates the stresses induced in the piezoelectric material to the applied electric field using the relation: {S}=[e]{E}, where {S} is the induced stress, [e] is the piezoelectric matrix and {E} is the electric field. The order of the stresses in {S} is S11, S22, S33, S12, S23, S13. The electric field components E1, E2, and E3 are relative to the local material axes. This is only applicable for the general piezoelectric material model. This is required for all structural analyses.