ANALYSIS SETUP

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

Figure 9.1.1 The Analysis Setup dialog window

Unit

The user can select a UNIT system by clicking the drop down menu 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 options provided in the Unit System drop down menu.

Draw Type

The user can select a draw type, as shown in Figure 9.1.3, by clicking on the drop down menu of DRAW TYPE.

Figure 9.1.3 The options provided in the Draw Types drop down menu

GRAVITY ONLY

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

SINGLE ACTION

The punch (male piece) is above the blank.

DOUBLE ACTION

The punch (male piece) is under the blank.

SPRING BACK

This is read in DYNAIN file

USER DEFINE

The DRAW TYPE is user defined

Note: The defined DRAW TYPE works in conjunction with the BLANKOPERATION/AUTO POSITION and TOOL/AUTOPOSITION

Figure 9.1.4 Types of Contact Interface for stamping simulation.

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 tooling and blank. The default contact interface between blank and all tooling is set as <Form One Way S. to S.>.

Note: Please refer to the LS-DYNA User's Manual, keyword *CONTACT, for 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.

Solver

The user can click the button to locate the location of the LS-DYNA solver from the SELECT SOLVER window as shown in Figure 9.1.5. After clicking OK, the entire directory will be displayed in the field as in Figure 9.1.1.

Figure 9.1.5 Select Solver window.