*CONTACT_AUTOMATIC_SURFACE_TO_SURFACE

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

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*CONTACT_AUTOMATIC_SURFACE_TO_SURFACE_{OPTION3}
If OPTION3 = ID, insert the following line.
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inter_ID Title
(1) (2) (3) (4) (5) (6) (7) (8)
SSID MSID SSTYP MSTYP    
FS FD DC       Tstart Tstop
SFS SFM SST MST SFTS SFMT FSF
Optional Card A
(1) (2) (3) (4) (5) (6) (7) (8)
SOFT          
Optional Card B
(1) (2) (3) (4) (5) (6) (7) (8)
           
Optional Card C
(1) (2) (3) (4) (5) (6) (7) (8)
      DTSTIF    

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 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. [ s m ] MathType@MTEF@5@5@+= feaagKart1ev2aqatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn hiov2DGi1BTfMBaeXatLxBI9gBaerbd9wDYLwzYbItLDharqqtubsr 4rNCHbGeaGqiVu0Je9sqqrpepC0xbbL8F4rqqrFfpeea0xe9Lq=Jc9 vqaqpepm0xbba9pwe9Q8fs0=yqaqpepae9pg0FirpepeKkFr0xfr=x fr=xb9adbaqaaeGaciGaaiaabeqaamaabaabaaGcbaWaamWaaeaada WcaaqaaiaadohaaeaacaWGTbaaaaGaay5waiaaw2faaaaa@39E3@
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.
SOFT Contact stiffness definition flag.
= 0
Contact stiffness is the average of the main and secondary stiffness.
> 0
Contact stiffness accounts for nodal mass of secondary and main components and optional time step.

(Integer)
DTSTIF Time step used for stiffness calculation. Used only if SOFT > 0.

(Real)

  

Comments

  1. This keyword maps to /INTER/TYPE25.