!CONTACTPAIR¶

Definition of contact surface pair used for contact analysis

First line

!CONTACT PAIR, NAME=<name> [,optional parameter]

Parameter
`NAME`	Contact pair name (mandatory)
`TYPE`	Type (omissible)

Parameter	Value	Description
`NAME`	<name>	Contact pair name
`TYPE`	`NODE-SURF`	Slave surface is a node group Master surface is a surface group (default)
	`SURF-SURF`	Both the slave and master surfaces are surface groups

Second and subsequent lines

(2nd Line or later) SLAVE_GRP, MASTER_GRP
(Continue in the same format.)

Variable	Type	Description
`SLAVE_GRP`	C	Slave surface node / surface group name
`MASTER_GRP`	C	Surface group name of the master surface

Notes

When refining the mesh (REFINE) during analysis, always use TYPE=SURF-SURF.
Even when TYPE=SURF-SURF is used, the contact algorithm within FrontISTR is a point-to-surface algorithm.

Reference

When TYPE=SURF-SURF is used, FrontISTR internally generates a node group automatically from the slave surface group and converts the pair into a contact surface pair consisting of a node group and a surface group.
The name of the automatically generated node group is formed by prefixing the original slave surface group name with FSTR_S2N_.