DEFINE CONTACT

 

This function is used to define the contact interface between the blank and a tool.  In most cases, the default setting, *CONTACT_FORMING_ONE_WAY_SURFACE_TO SURFACE, is utilized for contact between all tooling and blank.  The user can modify the contact interface for individual tools.

 

To modify the default contact interface setting, click on the DEFINE CONTACT button as shown in Figure 9.2.1 to display the TOOLS CONTACT dialog box as shown in Figure 9.2.3.

Figure 9.2.3 Define Contact dialog box

 

CONTACT TYPE

Select the CONTACT TYPE by clicking on the drop down button to display the list, and select the desired type.

 

NOTE:      Nine commonly used contact interfaces in sheet metal forming are offered in eta/DYNAFORM. They are:

 

1.       AUTO-NODES-TO-SURF

2.       AUTO-ONE-WAY-SURF-TO-SURF

3.       AUTO-SURF-TO-SURF

4.       FORMING-NODES-TO-SURF

5.       FORMING-ONE-WAY-SURF-TO-SURF

6.       FORMING-SURF-TO-SURF

7.       NODES-TO-SURF

8.       ONE-WAY-SURF-TO-SURF

9.       SURFACE-TO-SURFACE

 

DEFINE CONTACT PARAMETERS

This function allows the user to set the contact parameters such as static friction, damping coefficient, soft constraint, etc.

 

NOTE:      Refer to the LS-DYNA User's Manual for detailed information about each contact interface and its associated parameters.