Piezoelectric Materials

Definition

Piezoelectric material with losses.

Description

The verification of the materials is not automatically done within the context of the ATILA-GiD interface. It is recommended to use CPIEZO from the ATILA supervisor to check the validity of piezoelectric materials.
 
Opening the piezoelectric materials dialog window may take a moment.
General
Symmetry Class  
Density kg/m3
Mechanical
sE Elastic compliance at constant Electric field m2/N
Coupling
d Piezoelectric constants C/N
Dielectric
ET/E0 Relative permittivity at constant stress  
Losses
Delta M Mechanical loss angle
Delta P Piezoelectric loss angle
Delta D Dielectric loss angle
Check with CPIEZO
Magnetic
Relative magnetic permeability
Superpose magnetic domain to piezoelectric domain

Illustration

ATILA Implementation

- ATILA can use a different loss angle for every constant. In the interface, and as is usually done, we simplify this situation by using one loss angle per tensor.
 
- ATILA uses the absolute dielectric permittivity constants at constant strain (εS), therefore a transformation is made by the inteface.
 
- The dielectric loss angle (δd) is defined as the ratio of the imaginary to the real parts of the dielectric permittivities at constant stress.
 
- When the magnetic permeability is enabled, the mesh is "duplicated" so that a magnetic field computations can be performed on top of the elastic domain. Thus, both domains share the same nodes. This feature is typically used in magnetostrictive problems.

Back