/INTER/TYPE3
Block Format Keyword This interface is used to simulate impacts between two surfaces (with oriented segments). This interface works properly if the two surfaces are simply convex.
Description
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) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
/INTER/TYPE3/inter_ID/unit_ID | |||||||||
inter_title | |||||||||
surf_ID1 | surf_ID2 | Idel | |||||||
Stfac | Fric | Gap | Tstart | Tstop | |||||
IBC | IRS | IRm | |||||||
Definition
Field | Contents | SI Unit Example |
---|---|---|
inter_ID | Interface
identifier. (Integer, maximum 10 digits) |
|
unit_ID | Unit identifier. (Integer, maximum 10 digits) |
|
inter_title | Interface
title. (Character, maximum 100 characters) |
|
surf_ID1 | First surface
identifier. (Integer) |
|
surf_ID2 | Second surface
identifier. (Integer) |
|
Idel | Node and segment deletion flag.
(Integer) |
|
Stfac | Interface stiffness scale
factor must be less than 1.0. Default = 0.2 (Real) |
|
Fric | Coulomb
friction. (Real) |
|
Gap | Gap for impact
activation. (Real) |
|
Tstart | Start time for contact
impact computation. (Real) |
|
Tstop | Time for temporary
deactivation. (Real) |
|
IBC | Deactivation flag of
boundary conditions at impact. (Boolean) |
|
IRS | Renumbering flag for
segments of the first surface.
(Integer) |
|
IRm | Renumbering flag for
segments of the second surface (same as IRS).
(Integer) |
|
Maximum tangential
pressure. 4
Generally, is defined as yield stress. Default = 1030 (Real) |
Flags for Deactivation of Boundary Conditions: IBC
(1)-1 | (1)-2 | (1)-3 | (1)-4 | (1)-5 | (1)-6 | (1)-7 | (1)-8 |
---|---|---|---|---|---|---|---|
IBCX | IBCY | IBCZ |
Definition
Field | Contents | SI Unit Example |
---|---|---|
IBCX |
(Boolean) |
|
IBCY |
(Boolean) |
|
IBCZ |
(Boolean) |
Comments
- The flag Idel =1 has a CPU cost higher than Idel =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.
- Boundary conditions are only deactivated on surf_ID1.
- In 2D analysis, tangent contact force is
limited when
is defined by the following
equation:
While, is extrapolated length of segments connected to the secondary node.