GETTING STARTED FROM SCRATCH

This section will help users getting started in eta/DYNAFORM when line or model data is unavailable.  The user will typically generate his/her own line data according to the following procedure:

 

1.        Create a new part in the PARTS menu.

 

          Lines or elements cannot be created in an empty database.  The user must create a part before defining any geometry of model data.

 

2.        Generate line data by its coordinates.  Refer to Section 5.1.1 in Chapter 5, PREPROCESS, for additional information on generating lines.

 

          Exit the PARTS menu.

 

          Enter the PREPROCESSING/LINE/POINTS menu.

 

          Select the CREATE LINE command.

 

          Select the LCS or ABS option for the coordinates in the current local or global coordinate system.  Refer to Section 11.15, LOCAL COORDINATE SYSTEM.

 

          Select the XYZ or DXYZ option.

 

          If XYZ is selected, the key-in values of U, V, and W are the coordinates.

 

          If DXYZ is selected, the key-in values of DU, DV, and DW are increments of the previously created point.

 

          Key in the three values in the corresponding field.

 

          Select OK to confirm the values and create the point.

 

The prompt asks for the coordinates until the user selects either EXIT or DONE from the options area of the display screen.

 

eta/DYNAFORM lines consist of multiple points.  Using the DONE 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 a model 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, or blank) via the TOOL DEFINITION menu.  In this menu, the blank material and thickness and the tool positioning can also be defined.  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 TOOL DEFINITION menu. Proceeding to ANALYSIS PARAMETER in the SETUP menu, the user can directly submit a job from the eta/DYNAFORM window via the ANALYSIS menu.  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 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 from the analysis output. A blank may be trimmed using the TRIM command under BLANK OPERATIONS submenu in the TOOL DEFINITION menu. Once the analysis is complete, the results can be viewed by reading the d3plot files into the POSTPROCESS portion of the program.

 

Please refer to Chapter 8.1 for detailed simulation procedure using QUICKSETUP.

 

Please refer to Chapter 6 for detailed steps for generation of die face using DFE.