DEFINE CONTACT

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

To change the default contact interface settings, click on the DEFINE CONTACT button as shown in Figure 9.2.1. The TOOLS CONTACT dialog window (Figure 9.2.3) appears.


Figure 9.2.3 Define Contact dialog window.

CONTACT TYPE

Select the CONTACT TYPE combination list box, and select the desired type.

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

AUTO-NODES-TO-SURF

AUTO-ONE-WAY-SURF-TO-SURF

AUTO-SURF-TO-SURF

FORMING-NODES-TO-SURF

FORMING-ONE-WAY-SURF-TO-SURF

FORMING-SURF-TO-SURF

NODES-TO-SURF

ONE-WAY-SURF-TO-SURF

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.