/DEFAULT/INTER/TYPE25

Block Format Keyword Defines default values for all /INTER/TYPE25.

Format

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/DEFAULT/INTER/TYPE25
Blank
Istf Igap Irem_i2 Idel Iedge
Blank
Igap0 Ishape
Required Fields
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
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Inacti
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Definition

Field Contents SI Unit Example
Istf Interface stiffness definition flag.
=0
Set to 1000.
2
Interface stiffness is the average of the main and secondary stiffness.
3
Interface stiffness is the average of the main and secondary stiffness.
4
Interface stiffness is the minimum of the main and secondary stiffness.
5
Interface stiffness is the main and secondary stiffness in series.
= 1000 (Default)
Interface stiffness is only based on the main side stiffness.

(Integer)
Igap Gap/element option flag.
=0
Set to 1
=1 (Default)
Variable gap varies according to the characteristics of the impacted main surface and the impacting secondary node.
=2
Variable gap + deactivating secondary nodes if element size < gap value, in case of self-impact contact similar to Irem_gap=2 for /INTER/TYPE7.
=3
Variable gap + size of the mesh is taken into account to avoid initial penetrations.

(Integer)
Ishape Flag defining the shape of the gap along free edges.
= 0
Set to 1.
= 1 (Default)
Square gap.
= 2
Round gap.
Irem_i2 Deactivating flag for the secondary node, if the same contact pair (nodes) has been defined in interface TYPE2.
=0
Set to 1
=1 (Default)
Secondary nodes in /INTER/TYPE2 tied contacts are removed from this contact.
=3
No change to secondary nodes.
Idel
=0
Set to 1000
= 1
When all the elements (4-node shells, 3-node shells, solids) associated to one segment are deleted, the segment is removed from the main side of 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 secondary side of the interface.
= 2
When a 4-node shell, a 3-node shell or a solid element is deleted, the corresponding segment is removed from the main side of 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 secondary side of the interface.
= 1000 (Default)
No deletion.
Iedge Edge contact options. Contact occurs between main and secondary edges which are automatically extracted from surf_ID1 and surf_ID2. Sharp edges for external solid faces are defined using the angle Edge_angle.
= 0
Set to the value defined in /DEFAULT/INTER/TYPE25
= 1
The secondary and the main edges are the external border edges of shell segments. There is no edge contact for solid elements.
= 11
The secondary edges are the sharp edges of the external solid segments and external border edges of shell segments. The main edges are all edges from external solid segments and external border edges of shell segments.
= 13
The secondary edges are the sharp edges of the external solid segments and external border edges of shell segments. The main edges are all edges from external solid segments and all shell segments.
= 22
The secondary and main edges are all edges from external solid segments and all edges from shell segments.
= 1000 (Default)
No edge to edge contact.

(Integer)
Igap0 Gap modification flag for secondary shell nodes on the free edges.
=0
Set to 1000
= 1
Set gap to zero for the secondary shell nodes.
= 1000 (Default)
No change.

(Integer)
Inacti Initial penetration flag.
=0
Set to 1000
= -1
All initial penetrations are taken into account.
= 5
The main segment is shifted by the initial penetration value P 0 .
If P ≥ P 0 , then P ' = P − P 0 , where P 0 is the initial penetration.
= 1000 (Default)
Only tiny initial penetrations (1.0e-08) will be taken into account.

(Integer)