Home / Examples / Piezoelectric Analysis [Rayleigh] / Example 14: Slit

Example 14: Slit

General

• An piezoelectric device with a slit is analyzed.
   

• The [discontinuous] boundary condition is applied to the slit which is expandable freely.
   

• The resulting displacement vectors can be viewed.
   

• Unless specified in the list below, the default conditions will be applied.
   

• Obtain this session's project file. (Right-click and choose 'Save link as')




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

 

Analysis Space

Item	Settings
Analysis Space	3D
Model Unit	mm

 

Analysis Conditions

Item	Settings
Solver	Piezoelectric Analysis [Rayleigh]
Analysis Type	Static Analysis
Options	N/A

Model

The slit is defined as an imprinting sheet body. The [discontinuous] boundary condition is set to it.

Body Attributes and Materials

Body Number/Type	Body Attribute Name	Material Name
0/Solid	metal	504_SUS304 *
1/Solid	metal	504_SUS304 *
3/Solid	unit_2	000_P-4 *
4/Solid	unit_1	000_P-4 *
5/Sheet	Imprinting body

* Available from the material DB

 

The polarizations are set as follows.

Body Attribute Name	Direction
unit_1	Vector Specified Vector: X=-1.0, Y=0.0, Z=0.0
unit_2	Vector Specified Vector: X=1.0, Y=0.0, Z=0.0

Boundary Conditions

Boundary Condition Name/Topology	Tab	Boundary Condition Type	Settings
earth/Face	Electric	Electric Wall	Electric Potential Specified: Electric Potential 0 [V]
hot/Face	Electric	Electric Wall	Electric Potential Specified: Electric Potential 1[V]
slit/Face	Symmetry/Continuity		Discontinuous

 

Results

The vibration of the device is shown below. The color contour indicates the magnitude of displacement.

 

The device opens opens outward at the slit.