II. How To Use ATILA

3.4 Cymbal (1)
GEOMETRY/DRAWING MATERIAL ASSIGNMENT


PROBLEM - Cymbal 12 mm f x 2.4 mm t (Metal thickness 0.2 mm, PZT thickness 0.5 mm x two layer, Cavity hight 0.5 mm)


  • Composite of two complicated phases
  • Learn the layer usage
  • Learn the symmetry treatment

GEOMETRY/DRAWING

Layer Definition for "Cap"
Utilities -> Layers -> Name the layer as “Cap”
View Plane
View -> Rotate -> Plane XZ

Create Line
Surface : Geometry -> Create -> Line -> Enter First and Second Corner Points -> 0, 0, 1.2 -> 1.5, 0, 1.2 -> 4.5, 0, 0.7 -> 6, 0, 0.7
Create Endcap Surface
Copy/Transform -> Line Rotation by 45 degree twice -> Select the lines

Create Center Surface
Geometry -> Create -> Object -> Rectangle -> Enter First and Second Corner Points -> 0, 0, 1.2 & 0.7, 0.7, 1.2
Divide Surface & Delete Lines
Line division : Geometry -> Edit -> Divide -> Near point -> Geometry -> Delete Lines -> Create NURBS surface by Automatic & Contours

Create Volumes
Utilities -> Copy -> Surfaces -> Extrude Surfaces by -0.2 mm -> Select
Geometry -> Create -> Volume -> Automatic -> 6-sided volumes -> 7 Volumes appear in blue lines

Layer Definition for "PZT Disk"
Utilities -> Layers -> Name the layer as “PZT”
View Plane
View -> Rotate -> Plane XZ
Create Lines & Divide the Surface
Geometry -> Create -> Lines -> First Point 0, 0, 0 -> Second point 4.5,0,0 -> Third point -> 6,0,0

Create Endcap Surface
Copy/Transform -> Line Rotation by 45 degree twice -> Select the lines

Create Center Surface
Geometry -> Divide Lines -> 0.7,0,0 & 0,0.7,0
Geometry -> Create -> Lines -> Point 0.7,0,0 -> 0.7,0.7,0 -> 0,0.7,0
Geometry -> Create -> NURBS Surfaces -> Automatic

Create Volumes
Utilities -> Copy -> Surfaces -> Extrude Surfaces by 0.5 mm -> Select
Geometry -> Create -> Volume -> Automatic -> 6-sided volumes -> 5 Volumes appear in blue lines

MATERIAL ASSIGMENT
Piezoelectric Materials

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

Elastic Materials

Data -> Materials -> Elastic -> Brass -> Assign -> Pick Volumes

Click Draw -> All materials -> Check the material are assigned as PZT4 and Brass

  • Note that this 1/8 part is enough for the simulation, as long as we will consider the symmetrical mode.