Piezoelectric in Ansys Workbench 1

[EngTipX]

I have read Ansys workbench training material (Solving Piezoelectric with commands objects-included at the bottom some commands).

Question(s):
How to align properly piezo material properties with respect to cylinderical coordinate?
How to link the properties to the cylindrical coordinat?

What kind of meshing should be used in order to produce a compatible element? For example, in the training they used sweep mesh then they replaced the element with solid226
What would be the meshing for 2d analysis? so as to use plane223?

How to use the model as an actuator? How to use the model as a sensor?

The training material used the following command lines to change the problem to piezo

under the piezoelectric body (in mechanical model tree) the following command is added:

et,MATID,226,1001

mp,perx,MATID,804.6
mp,pery,MATID,804.6
mp,perz,MATID,659.7

tb,piez,MATID
tbdata, 3,-4.1 ! e13 piezoelectric constant
tbdata, 6,-4.1 ! e23 piezoelectric constant
tbdata, 9,14.1 ! e33 piezoelectric constant
tbdata,14,10.5 ! e52 piezoelectric constant
tbdata,16,10.5 ! e61 piezoelectric constant


Notice the use of sweep mesh on piezo bodies

Then the following command (as boundary condition):
d, Neg, volt, 0
d, Pos, volt, 10


cp, next, volt, Pos

where Neg and Pos are named selections representing Negative and Positive.



Again I'm new here. Please be patient with me.

 

[EngTipX]

If I add the material lines. I get huge unbelievable numbers for the results let's say before adding
The stress was around 14
After adding the material properties
The stress become 3.e+13

That is by just adding these lines
et,MATID,226,1001
mp,perx,MATID,804.6
mp,pery,MATID,804.6
mp,perz,MATID,659.7

tb,piez,MATID
tbdata, 3,-4.1 ! e13 piezoelectric constant
tbdata, 6,-4.1 ! e23 piezoelectric constant
tbdata, 9,14.1 ! e33 piezoelectric constant
tbdata,14,10.5 ! e52 piezoelectric constant
tbdata,16,10.5 ! e61 piezoelectric constant

 

[EngTipX]

Can anyone guide me on how to find specific help? Is there a specialist that I can talk to about specific problems like this?
It is unfortunate that no body uses command snippet where I am. It is also unfortunate that it is hard to find those who worked in the same area.

 

[Mahboube]

Hi

I work in this area,a short time
3D element is better than 2D element beacuse of their precision,but both of them applicable.
for actuator behavior ,apply voltage on piezo layer,then give strain response,for sensor ,apply force on this,then give voltage or charge or admittance response of this,with harmonic analysis.
I have a question about circuit for piezo system,can you help me?