/DEFAULT/INTER/TYPE11

Block Format Keyword Defines default values for TYPE11 interfaces.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
/DEFAULT/INTER/TYPE11
Blank
    Istf   Igap   Irem_gap Idel    
        Iform  
Blank
      Inacti      

Definitions

Field Contents SI Unit Example
Istf Stiffness definition flag.
= 0
Set to 5
= 1
Interface stiffness is entered as Stfac.
=2
Interface stiffness is the average of the main and secondary stiffness.
=3
Interface stiffness is the maximum of the main and secondary stiffness.
=4
Interface stiffness is the minimum of the main and secondary stiffness.
=5 (Default)
Interface stiffness is the main and secondary stiffness in series.

(Integer)

  
Igap Gap/element option flag.
= 0
Set to 1000.
= 1
Gap varies accordingly to the characteristics of the impacted main line and the impacting secondary node.
= 3
Gap varies according to the characteristics of the impacted main line and the impacting secondary node + gap is taken into account the size of the elements.
= 1000 (Default)
Gap is constant equal to Gapmin.

(Integer)

  
Irem_gap Flag for deactivating neighboring secondary line segments, if element size < gap value in case of self-impact contact.
= 0
Set to 1.
= 1 (Default)
No deactivation of secondary line segments.
= 2
Deactivation of neighboring secondary line segments.

(Integer)

  
Idel Node and segment deletion flag. 6
= 0
Set to 1000.
= 1
When all the elements (4-node shells, 3-node shells, solids, beams, trusses, and springs) associated to one segment are deleted, the segment is removed from the interface. It is also removed in case of explicit deletion using Radioss Engine keyword /DEL in the Engine file.
Additionally, non-connected nodes are removed from the interface.
= 2
When an element (4-node shell, 3-node shell, solid, beam, truss, spring) is deleted, the corresponding segment is removed from the interface. It is also removed in case of explicit deletion using Radioss Engine keyword /DEL in the Engine file.
Additionally, non-connected nodes are removed from the interface.
= -1
Same as =1, except non-connected nodes are not removed from the secondary side of the interface.
= -2
Same as =2, except non-connected nodes are not removed from the secondary side of the interface.
= 1000 (Default)
No deletion.

(Integer)

  
Iform Friction penalty formulation type. 17
= 0
Set to 1.
= 1 (Default)
Viscous (total) formulation.
= 2
Stiffness (incremental) formulation.

(Integer)

  
Inacti Deactivation flag of stiffness. 13
= 0
Set to 1000.
= 1
Deactivation of stiffness on nodes.
= 2
Deactivation of stiffness on elements.
= 3
Change node coordinates to avoid initial penetrations.
= 5
Gap is variable with time and initial gap is computed as:
ga p 0 = Gap − P 0 where, P 0 is the initial penetration.
= 6
Gap is variable with time but initial penetration is computed as (the node is slightly depenetrated):
ga p 0 = Gap − P 0 − 5 % ⋅ ( Gap − P 0 )
= 1000 (Default)
No action.

(Integer)