Home / Examples / Piezoelectric Analysis [Rayleigh] / Example 7: Thermal Load and Mechanical Strain

Example 7: Thermal Load and Mechanical Strain

General

A piezoelectric device is thermally loaded. The resulting mechanical strain generates voltage on a floating electrode. This temperature sensor is analyzed.
The deformation and the generated electric potential are solved.
Unless specified in the list below, the default conditions will be applied.

Results will vary depending on Femtet version and the PC environment.

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

Analysis Conditions

Select "Thermal load" option.

Item	Settings
Solver	Piezoelectric Analysis [Rayleigh]
Analysis Space	3D
Options	Thermal Load Reached temperature: 100 [deg], Reference temperature: 25 [deg]

Model

A piezoelectric plate is placed on an aluminum plate. The bottom face of the piezoelectric plate is fixed at 0 [V]. The top face is set with the [Floating Electrode] boundary condition.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	metal	001_Al *
1/Solid	piezo	000_P-4 *

* Available from the material DB

Boundary Conditions

Boundary Condition Name/Topology

Tab

Boundary Condition Type

Settings

earth/Face

Electric

Electric Wall

Electric Potential Specified:

Electric Potential 0 [V]

out/Face

Electric

Electric Wall

Floating Electrode

Results

The displacement is shown below by contour.

The device is deformed due to the difference in coefficients of linear thermal expansion.

To see the electric potential generated on the floating electrode, go to [Results] tab

and click [Table] .