| Istf |
Stiffness definition flag.
9
- = 0
- Set to 1000.
- = 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
- Interface stiffness is the main and secondary stiffness
in series.
- = 1000 (Default)
- For node to surface contact, interface stiffness is only
based on main stiffnes.
- For edge to edge contact, 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 surface and the impacting secondary
node.
- = 3
- Variable gap + gap scale correction of the computed gap
+ size of the mesh is taken into account to avoid
initial penetrations.
- = 4
- Node to surface contact uses variable gap + gap scale
correction of the computed gap + deactivation of
neighbor secondary nodes, if element size < gap. Edge
contact uses a constant contact gap, Gapmin.
- = 1000 (Default)
- Gap is constant and equal to the minimum gap.
(Integer)
|
|
| Iedge |
Edge to edge contact flag.
24
- = 0
- Set to 2.
- = 1
- Only external edges of defined surfaces are
generated.
- = 2 (Default)
- All segment edges of defined surfaces are
generated.
(Integer)
|
|
| Ibag |
Airbag vent holes closure
flag in case of contact.
- = 0
- Set to 2.
- = 1
- Closure.
- = 2 (Default)
- No closure.
(Integer)
|
|
| Idel |
Node and segment deletion
flag. 6
- = 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.
- = -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.
(Integer)
|
|
| Irem_gap |
Flag for deactivating
secondary nodes, if element size < gap value, in case of
self-impact contact.
- = 0
- Set to 1.
- = 1 (Default)
- No deactivation of secondary nodes.
- = 2
- Deactivation of secondary nodes.
(Integer)
|
|
| Irem_i2 |
Flag for deactivating the
secondary node, if the same contact pair (nodes) has been defined in
/INTER/TYPE2.
- = 0
- Set to 1, if /IMPLICIT is
defined.
- Set to 3 for explicit solution.
- = 1 (default for implicit solution, if
/IMPLICIT is defined)
- Secondary nodes in /INTER/TYPE2 tied
contacts are removed from this contact.
- = 3 (default for explicit
solution)
- No change to secondary nodes.
(Integer)
|
|
| Inacti |
Deactivation flag of
stiffness in case of initial penetrations. 19
- = 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:
-
where,
is the initial
penetration.
- = 6
- Gap is variable with time, but initial penetration is
computed as (the node is slightly depenetrated):
-
- = 1000 (Default)
- No action.
(Integer)
|
|
| Iform |
Friction penalty
formulation type.
- = 0
- Set to 1.
- = 1 (Default)
- Viscous (total) formulation.
- = 2
- Stiffness (incremental) formulation.
(Integer)
|
|