2023.1

2023.1

*CONTACT_AUTOMATIC_GENERAL

LS-DYNA Input Interface KeywordDefine an automatic general contact interface between elements.

Format

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
*CONTACT_AUTOMATIC_GENERAL

If OPTION3 = ID, insert the following line.

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
`inter_ID`	`Title`

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
`SSID`		`SSTYP`
`FS`	`FD`	`DC`				`Tstart`	`Tstop`
`SFS`		`SST`		`SFTS`		`FSF`

Optional Card A

(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
`SOFT`

Definition

Field	Contents	SI Unit Example
`OPTION3`	ID Include a contact identifier and title.
`inter_ID`	Contact interface identifier. (Integer)
`Title`	Contact interface title. (Character, maximum 70 characters)
`SSID`	Set or part identifier. (Integer)
`SSTYP`	Input set type. = 0 Segment set ID. = 1 Shell element set ID. = 2 Part set ID. = 3 Part ID. = 5 All parts (`SID` is ignored). = 6 Part set ID. All parts are included in the contact, except the one defined in the part set ID. = 7 Subset set ID. (Integer)
`FS`	Static friction coefficient. (Real)
`FD`	Dynamic friction coefficient. (Real)
`DC`	Exponential decay coefficient.	$[\frac{s}{m}]$
`Tstart`	Start time. (Real)	$[s]$
`Tstop`	Stop time. Default = 1E+30 (Real)	$[s]$
`SST`	Stiffness scale factor. (Real)
`SFS`	Maximum gap value. (Real)	$[m]$
`SFTS`	Contact gap scale. (Real)
`FSF`	Coulomb friction coefficient scale factor. (Real)
`SOFT`	Contact stiffness definition flag. = 0 Contact stiffness is the average of the main and secondary stiffness. > 0 Contact stiffness is the minimum of the main and secondary stiffness. (Integer)

Comments

This keyword maps to /INTER/TYPE25.