Page 163 - Using ANSYS for Finite Element Analysis Dynamic, Probabilistic, Design and Heat Transfer Analysis

150 • using ansys for finite eLement anaLysis
Enter values for next circle -> WP X = 11.25, WP Y = 1.25,
Radius = 1.25 -> OK
• Perform the Boolean operation add to union the areas together:
Preprocessor -> Modeling -> Operate -> Booleans -> Add
-> Areas -> Pick All
• Create geometry for three hexagons, two of 7 mm side (at the
ends) and one of 9 mm side (in the center):
Preprocessor -> Modeling -> Create -> Areas -> Polygon
-> Hexagon -> In dialogue box enter WP X = 1.25, WP Y =
1.25, Radius = 0.7 -> Theta = 120 -> Apply -> Enter values
for next hexagon -> WP X = 6.25, WP Y = 1.25, Radius =
0.9 -> Theta = 120 -> Apply -> Enter values for next hexa-
gon -> WP X = 11.25, WP Y = 1.25, Radius = 0.7 -> Theta =
120 -> OK
• Perform the Boolean operation subtract to get the hexagonal
holes in the wrench the body:
Preprocessor -> Modeling -> Operate -> Booleans -> Sub-
tract -> Areas -> Click on the solid portion of wrench ->
Apply -> One by one pick the three hexagonal areas -> OK
• Now create a mesh in the final wrench shape, first refining the
mesh size:
Preprocessor -> Meshing -> Size Controls -> ManualSize
-> Global > Size -> Enter Size = 0.1 -> OK
Preprocessor -> Meshing -> Mesh -> Areas -> Free -> Click
on wrench -> OK
• Apply the boundary conditions and the load:
Preprocessor -> Loads -> Analysis Type -> New Analysis
-> Static -> OK Preprocessor -> Loads -> Define Loads ->
Apply -> Structural -> Displacement -> On Key Points ->
Click on the six corner points of the left hexagon -> OK ->
Select All DOF -> OK
Preprocessor -> Loads -> Define Loads -> Apply -> Struc-
tural -> Pressure -> On Lines -> Pick the line indicated in
problem statement (top line of right arm) -> OK -> Enter
VALUE = 88 -> OK
• Perform the solution:
Solution -> Solve -> Current LS -> OK
• Start post-processing: Check the deformed shape:
General Post Proc -> Plot Results -> Deformed Shape ->
Def + undef edge -> OK
• To establish a command log file from the database log, pick
Utility Menu> File> Write DB Log File. You can specify a
file name or use the default name, Jobname.LGW.