II. How To Use ATILA

1.2 Circular Disk (6)
GEOMETRY MATERIAL ASSIGMENT BOUNDARY CONDITIONS


PROBLEM - 2D Circular Plate, kp Mode, PZT4 = 50mm f x 1mm t


  • Axisymmetrical shape can be solved by using 2D calculation. The symmetrical axis should be x axis.

GEOMETRY/DRAWING

Create Surface Simple structure list

Geometry -> Create -> Object -> Rectangle -> Enter first corner point-> 0,0 -> Enter second corner point-> 1,25 -> Enter

Remember that Point = Black color, Line = Blue color, Surface = Magenta, Volume = Cyan.

MATERIAL ASSIGMENT
Piezoelectric Materials

Data -> Materials -> Piezoelectric -> PZT4 -> Assign -> Surfaces -> Pick a Surface
Click Draw -> All materials -> Check the material is assigned as PZT4

BOUNDARY CONDITIONS
Potential on the Line

Data -> Conditions -> Lines -> Potential 0.0 (or Ground in ATILA 5.2.4 or higher version) -> Assign the right line-> Potential 1.0 -> Assign the left line

Polarization on the Surface

Data -> Conditions -> Surfaces -> Geometry -> Polarization (Cartesian) -> Define Polarization (P1)

We take the P1 right-ward along x [Local axis (1,0,0)]

Choose 3PointsXZ -> Define X axis by putting (0,1,0) -> Then define Z axis by putting (1,0,0) -> Escape

Assign Polarization (Local-Axes P1) -> Choose the surface -> Finish

To check the assignment -> Draw -> All the conditions -> Include Local axes

Mechanical Constraints on the Symmetrical Axis

This is the important technique for the 2D modeling.

Data -> Conditions -> Lines -> Line-Constraints -> Choose X-component "None", Y and Z-components "Clamped" -> Assign the bottom line (The symmetrical line should be taken on the X axis).

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