*CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TO_SURFACE

LS-DYNA Input Interface KeywordDefine surface to surface contact between a set of shell and solid elements.

Format


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*CONTACT_AUTOMATIC_ONE_WAY_SURFACE_TO_SURFACE_`{OPTION}`_`{OPTION3}`

If OPTION3 = ID or TITLE, insert the following line.


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`inter_ID`	`Title`


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`SSID`	`MSID`	`SSTYP`	`MSTYP`
`FS`	`FD`	`DC`				`Tstart`	`Tstop`
`SFS`	`SFM`	`SST`	`MST`	`SFTS`	`SFMT`	`FSF`

If OPTION2 = TIEBREAK, insert the following line.


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Optional Card A


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`SOFT`

Optional Card B


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Optional Card C


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			`DTSTIF`

Definition


Field	Contents	SI Unit Example
`OPTION`	<Blank> No option. TIEBREAK Option is read but tiebreak is not applied currently. SMOOTH Option is read but no effect on the contact behavior.
`OPTION3`	Include a contact identifier and title. ID TITLE
`inter_ID`	Contact interface identifier. (Integer)
`Title`	Contact interface title. (Character, maximum 70 characters)
`SSID`	Secondary set or part identifier. (Integer)
`MSID`	Main set or part identifier. (Integer)
`SSTYP`	Input secondary 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)
`MSTYP`	Input main 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. (Real)	$[\frac{s}{m}]$
`Tstart`	Start time. (Real)	$[s]$
`Tstop`	Stop time. Default = 1E+30 (Real)	$[s]$
`SFS`	Secondary stiffness scale factor. (Real)
`SFM`	Main stiffness scale factor. (Real)
`SST`	Secondary maximum gap value. (Real)	$[m]$
`MST`	Main maximum gap value. (Real)	$[m]$
`SFTS`	Secondary contact gap scale. (Real)
`SFMT`	Main 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. = 1 Contact stiffness is the minimum of the main and secondary stiffness. = 2 Contact stiffness based on the average of the main and secondary stiffness and time step stability condition. (Integer)
`DTSTIF`	Time step used for stiffness calculation. Used only if `SOFT` > 0. (Real)

Comments

This keyword maps to /INTER/TYPE25.