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Z88 A URORA ® E XAMPLE M ANUAL
Example 2: Fork Wrench
(Plane stress element No. 7 with 8 nodes)
is a registered trademark (No. 30 2009 064 238) of Univ. Prof. Dr.-Ing. Frank Rieg
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Example Manual
2. Example: DXF import and super structure (plane stress element No. 7 with 8 nodes)
The chosen example is a DXF file – a fork wrench built up by plane stress elements –
created in AutoCAD. With the help of this part the export and import procedure from
CAD system to Z88 Aurora is explained. In addition the refinement of super structures
and the accomplishment and interpretation of a strength determination is expounded.
Input files:
b1_x.dxf
Input file for CAD converter Z88X
b1_2.txt
Boundary conditions from Z88 V13
b1_3.txt
Header parameters for stress processor from Z88 V13
This example will be calculated twice to depict the functional range of Z88 Aurora
1) Import of ready-to-run structure file and constraint file
2) Import of the super structure and manual meshing and application of constraint
The ready-to-run examples are in the sub file folder “ 2v1 ” (model 1) und “ 2v2 ” (mod-
el 2).
Figure 1: DXF import in Z88 Aurora
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Example Manual
To create a new project, use
,
, e.g. Example2 , confirm with Enter and
exit the dialogue with OK ( Figure 2 ) . The first step is equal for both analyses.
Figure 2: Create new folder
Option 1: Ready-to-run structure file and constraint file
The necessary files are b1_x.dxf (structure file), b1_2.dxf (constraint file) and b1_3.dxf
(header parameters for stress processor).
To import the example file b1_x.dxf, use the
function of Z88 Aurora. A
new menu will appear at the right side. Use
to import the file (Figure 3) .
Choose the option “ conversion of DXF super structure to Z88i1.txt ” in the lower combo
box of the file chooser dialogue to import and net the super structure file. The FE mesh
will be created automatically by the mapped mesher Z88N. The element type is the
plane stress element No. 7 (see Theory Manual) ( Figure 3 ) . Use the button
of the import menu to import the boundary conditions B1_2.TXT and the header para-
meters for stress processor b1_3.dxf .
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Example Manual
Figure 3: Import the DXF data (b1_x.dxf), boundary conditions (b1_2.txt) and
header parameters for stress processor (b1_3.txt)
Switch to the preprocessor using the button. By pressing the button you can
change the view to see the FE mesh. On the right hand side you can see that a load case
already exists. If you click on the load case, the boundary conditions will be displayed.
The handle bar is fixed, the U-shaped opening is loaded ( Figure 4 ) .
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Example Manual
Figure 4: FE mesh with boundary conditions and load
To calculate the example, you have to switch to the solver menu using the
button.
Four different solvers are provided. For this example you can use the Cholesky solver.
Start the solver by pressing the button
Figure 5: Settings Cholesky solver
After pressing the RUN button a new window is opening, which starts the calculation if
the OK button has been clicked ( Figure 6 ) .
Figure 6: Start calculation
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