modeling of a piezoelectric composite plate
modeling of a piezoelectric composite plate
(OP)
Use ANSYS to analyze a piezoelectric composite plate:
Is there any way of inputing the material matrices of piezoelectric composite before transformation and then add an angle? I searched for the elements of
the structural layered composite, and they don't have the DOF of voltage-that's why I can not use this kind of elements. So, the only way is to input the material matrices (elastic, piezoelectric and dielectric matricex) after transformation?
Because I need to keep the DOFs of three displacements and voltage, I can only choose SOLID5 as the element type. It causes a problem that I can not mesh a thin plate with small size elements-the thickness of the plate can not be
divied up to the requirement of accuracy. How to solve this problem?
Appreciate your reply!
Is there any way of inputing the material matrices of piezoelectric composite before transformation and then add an angle? I searched for the elements of
the structural layered composite, and they don't have the DOF of voltage-that's why I can not use this kind of elements. So, the only way is to input the material matrices (elastic, piezoelectric and dielectric matricex) after transformation?
Because I need to keep the DOFs of three displacements and voltage, I can only choose SOLID5 as the element type. It causes a problem that I can not mesh a thin plate with small size elements-the thickness of the plate can not be
divied up to the requirement of accuracy. How to solve this problem?
Appreciate your reply!





RE: modeling of a piezoelectric composite plate
It looks like you want to do an Coupled-Field analyse.
So you need to take an look at that.
Gtrz
Garry
RE: modeling of a piezoelectric composite plate
RE: modeling of a piezoelectric composite plate
You want to model piezoelectric composite, and look at the displacemants what are caused by Volt?
You can make this work by using an struc-elek coupled-field analyse with an shell element.
Grtz
Garry
RE: modeling of a piezoelectric composite plate
RE: modeling of a piezoelectric composite plate
RE: modeling of a piezoelectric composite plate
The solid98 is the high order elemnt of solid5. And it will not help him. The best thing for him to do is to use a shell element( because of the thin elements).
Grtz
Garry
RE: modeling of a piezoelectric composite plate
RE: modeling of a piezoelectric composite plate
There are two ways of doing it:
-using solid element 5/98, with this element you can do an direct coupled analysis, but when your volume is very thin you maybe get bad results. Also it is easier to model.
-using shell elements, with this element you can model thin elements. Disadvantage you need to do and couple-field analysis. Its also difficult to model the layers. Advantage is the amongt of elements which can be very low. So you decide what you want to do!
Grtz
Garry
RE: modeling of a piezoelectric composite plate
I got an ANSYS error message, which consequence is still unclear to me:
Specified constraint not allowd on slave DOF in coupled set. Coupled set No.1 First node=2 Slave node= xxxx DOF=volt
Move constraints to first node or remove coupling and constrain all.
Does anyone can give me a hint, where to find some more information concerning this error message? Or can anyone explain me the backgrounds of this error?
Thanks
Alex
RE: modeling of a piezoelectric composite plate
alex
RE: modeling of a piezoelectric composite plate
I used the direct method to model the thin structure and can not get good results. I don't quite understand what you said about the second method (sequential method). I only apply electric potential to the plate. How can I model with shell elements without the DOF of volt? To do a piezoelectric analysis, the manual have specialized six kinds of elements:
plane13/223, solid5/98, solid226/227.