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:
-
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)
|
|