ANALYSIS SETUP

 

This function enables the user to define forming parameters for the LS-DYNA ANALYSIS. The dialog box is shown in Figure 9.1.1.

 

Figure 9.1.1 The Analysis Setup dialog box

 

UNIT

The user can select a UNIT system by clicking the drop down button of UNIT.  As shown in Figure 9.1.2, four types of UNIT systems are available. The default UNIT system is set as <MM, TON, SEC, N>.

Figure 9.1.2 The Unit System Drop Down Menu

DRAW TYPE

The user can select a draw type by clicking on the drop down button of DRAW TYPE to display the menu as illustrated in Figure 9.1.3.

 

Figure 9.1.3 The Draw Types Drop Down Menu

 

GRAVITY ONLY

No punch and die is used as the blank is deformed by gravity.

 

SINGLE ACTION

The die (female piece) is above the blank.

 

DOUBLE ACTION

The die (female piece) is below the blank.

 

SPRING BACK

Relieve residual stresses of deformed sheet metal part (imported DYNAIN file).

 

USER DEFINE

The DRAW TYPE is user defined.

 

NOTE: The defined DRAW TYPE works in conjunction with both the BLANK OPERATION/AUTO POSITION and TOOL/AUTO POSITION functions.

 

Figure9.1.4 Contact Interface Types

 

CONTACT INTERFACE

There are several types of contact interface available for an LS-DYNA stamping simulation, as listed in Figure 9.1.4.  The user can set the type of contact interface between all the tooling and the blank. The default contact interface between the blank and the tooling is set as FORM ONE WAY S. TO S.

 

NOTE: Please refer to the LS-DYNA User's Manual, keyword *CONTACT, for more detailed information about each of the contact interfaces.

 

 

STROKE DIRECTION

The user can define stroke direction in X, Y, or Z.

 

CONTACT GAP

The contact gap is the minimum distance between the tooling and blank after auto-positioning. The default contact gap is set to 1.0. The contact gap will be overwritten if blank thickness is defined.

 

DYNA SOLVER PRECISION

This option enables user to set the directory of the Single Precision solver and Double Precision solver. User can click the  button to change the directory.