Block Format Keyword
/INTER/TYPE3 - Interface Type 3
Description
This interface is used to simulate impacts between two surfaces (with oriented segments). This interface works properly if the two surfaces are simply convex. The main limitations are:
| • | The segment normals must be oriented from one surface to the other |
| • | Only works with segments connected to solid or shell elements |
| • | The same node may not be put in the two impact surfaces |
Format
(1)
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(2)
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(3)
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(4)
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(5)
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(6)
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(7)
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(8)
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(9)
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(10)
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/INTER/TYPE3/inter_ID/unit_ID
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inter_title
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surf_ID1
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surf_ID2
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Idel
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Stfac
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Fric
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Gap
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Tstart
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Tstop
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IBC
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IRS
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IRM
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Field
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Contents
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SI Unit Example
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inter_ID
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Interface identifier
(Integer, maximum 10 digits)
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unit_ID
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Optional unit identifier
(Integer, maximum 10 digits)
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inter_title
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Interface title
(Character, maximum 100 characters)
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surf_ID1
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First surface identifier
(Integer)
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surf_ID2
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Second surface identifier
(Integer)
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Idel
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Node and segment deletion flag
Default = 0 (Integer)
= 0: no deletion
= 1: when all the elements (4-node shells, 3-node shells, solids) 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 a 4-node shell, a 3-node shell or a solid element 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.
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Stfac
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Interface stiffness scale factor. Must be less than 1.0.
Default = 0.2 (Real)
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Fric
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Coulomb friction
(Real)
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Gap
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Gap for impact activation
(Real)
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Tstart
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Start time for contact impact computation
(Real)
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Tstop
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Time for temporary deactivation
(Real)
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IBC
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Deactivation flag of boundary conditions at impact
(Boolean)
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IRS
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Renumbering flag for segments of the first surface
(Integer)
= 0: if segment is connected to a solid element its normal is reversed if entering the solid element (the segment is renumbered)
= 1: normal is always reversed (segment 1234 is read 2143)
= 2: normal is never reversed (segments connected to a solid element are not renumbered)
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IRM
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Renumbering flag for segments of the second surface (same as IRS)
(Integer)
= 0: if segment is connected to a solid element its normal is reversed if entering the solid element (the segment is renumbered)
= 1: normal is always reversed (segment 1234 is read 2143)
= 2: normal is never reversed (segments connected to a solid element are not renumbered)
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(1)-1
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(1)-2
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(1)-3
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(1)-4
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(1)-5
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(1)-6
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(1)-7
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(1)-8
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IBCX
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IBCY
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IBCZ
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Field
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Contents
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SI Unit Example
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IBCX
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=1 : Deactivation flag of X boundary condition at impact
(Boolean)
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IBCY
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= 1: Deactivation flag of Y boundary condition at impact
(Boolean)
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IBCZ
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= 1: Deactivation flag of Z boundary condition at impact
(Boolean)
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| 1. | The flag Idel =1 has a CPU cost higher than Idel =2. |
| 2. | If IBCX = 1, the boundary condition in X direction is deactivated. IBCY and IBCZ behave the same way respectively in Y and Z direction. |
| 3. | Boundary conditions are only deactivated on surf_ID1. |
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See Also:
Interface TYPE3 in User's Guide
Penalty Method in User's Guide
Interface TYPE3 in Theory Manual
