Istf |
Stiffness definition flag.
- = 0
- Set to 5
- = 1
- Interface stiffness is entered as Stfac.
- =2
- Interface stiffness is the average of the master and
slave stiffness.
- =3
- Interface stiffness is the maximum of the master and
slave stiffness.
- =4
- Interface stiffness is the minimum of the master and
slave stiffness.
- =5 (Default)
- Interface stiffness is the master and slave stiffness in
series.
(Integer)
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Igap |
Gap/element option flag.
- = 0
- Set to 1000.
- = 1
- Gap varies accordingly to the characteristics of the
impacted master line and the impacting slave node.
- = 3
- Gap varies according to the characteristics of the
impacted master line and the impacting slave node + gap
is taken into account the size of the elements.
- = 1000 (Default)
- Gap is constant equal to Gapmin.
(Integer)
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Irem_gap |
Flag for deactivating
neighboring slave line segments, if element size < gap value in
case of self-impact contact.
- = 0
- Set to 1.
- = 1 (Default)
- No deactivation of slave line segments.
- = 2
- Deactivation of neighboring slave line segments.
(Integer)
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|
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 slave side of the
interface.
- = -2
- Same as =2, except non-connected nodes
are not removed from the slave side of the
interface.
- = 1000 (Default)
- No deletion.
(Integer)
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|
Iform |
Friction penalty
formulation type. 17
- = 0
- Set to 1.
- = 1 (Default)
- Viscous (total) formulation.
- = 2
- Stiffness (incremental) formulation.
(Integer)
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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)
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