The QuickSetup/Springback GUI (as shown in Figure 9.4.1) allows the user to easily setup a springback analysis.

Figure 9.4.1  The QuickSetup Springback GUI

TOOL DEFINITION GUI

Allow the user to define a deformed blank. After selecting the Trim Blank button, select the trim curve to carry out the trim operation. By default, the deformed blank is assigned automatically as Blank after the file (in .dynain format) is read into the eta/DYNAFORM database.

BLANK PARAMETERS

Define blank material and properties.

CONTROL

The user can either select the single-step or multi-step implicit method. The single-step implicit method is the default setting. If it does not provide converged springback results, the user may select the multi-step implicit method for the springback analysis.

The coarsening option can be activated to combine the refined mesh prior to springback analysis. The function allows the eta/DYNAFORM solver to combine neighbouring elements that have a normal angle difference whick is less than a given tolerance angle (default is 8°). Coarsening blank mesh can reduce computational noise, and therefore helps the springback simulation to converge.

CONSTRAINT

Enable the user to select appropriate constraint points to prevent rigid body motion during springback analysis.

IMPLICIT PARAMETERS

Define parameters for springback analysis. The dialog box is shown in Figure 9.4.2. For detailed information about each parameter, refer to the LS-DYNA Keyword User’s Manual.

Figure 9.4.2  The Implicit Parameter dialog box