This section will
help users getting started in eta/DYNAFORM when line data or FE model data is
unavailable. The user will typically
generate his/her own line data according to the following procedure:
·
Create
a new part in the Parts menu.
Lines or meshes cannot be created
in an empty database, so a default part (PART000) is created by default in a
new database.
·
Generate
line data by its coordinates. Refer to Section 5.1 for additional information on generating
lines.
1.
Exit
the Parts menu.
2.
Enter
the UserSetup/Preprocess menu.
3.
Select
the Create Line command.
4.
Select
the LCS or ABS option for the coordinates in the current local or global
coordinate system. Refer to Section 2.5, Local Coordinate System.
5.
Select
the XYZ or DXYZ option.
If XYZ is selected, the keyed-in
values of U, V, and W are the coordinates.
If DXYZ is selected, the keyed-in
values of DU, DV, and DW are increments from the previously created point.
6.
Key
in the corresponding values in the field.
7.
Select
Apply Input Value to confirm the values and create the point.
The prompt asks for the coordinates until the user selects either OK or
Cancel from the options area of the display screen.
eta/DYNAFORM lines consist of multiple points. Using the OK command
will create an end to a current line.
Note: The user may continue to generate line data or execute the other CAD functions available in the Preprocess menu. Generating FE model data from line data is described in Section 5.3, Element.
Once the desired geometry has been created
and meshed, the user can define each part as a specific tool (e.g. a die,
punch, upper/lower ring) via the UserSetup/Define Tools menu. In the
UserSetup/Define Blank menu, the blank material and thickness can be defined. Tool
positioning can also be defined from UserSetup/Position Tools. Once the tools are defined, the interface
between the tools will automatically be generated during the writing of the
LS-DYNA file.
A draw bead can be defined in the UserSetup/Draw Bead menu. Proceeding
to UserSetup menu, the user can directly submit a job from the eta/DYNAFORM
window via the LS-DYNA option. Once the
analysis is complete, the result files can be loaded and viewed by the PostProcess
portion of the program.
After the forming analysis is complete, the result file type .dynain can be read in to view the formed blank shape. This file is now
ready for subsequent springback analysis or multi-step stamping simulation. A
trimmed blank model can be written out as another .dynain input file through Export
function. A blank may be trimmed using the Trim command under Blank Operation
submenu in the UserSetup menu. Once the analysis is complete, the results can
be viewed by reading the d3plot files into the eta/POST portion of the program.
Please refer to Chapter 8 for detailed simulation procedure.
Please refer to Chapter 7 for detailed steps for generation of die
face using DFE.