BSCONP (Surface Contact Parameters)

Description

The BSCONP entry defines the parameters for a surface contact region.

Format

1 2 3 4 5 6 7 8 9 10
BSCONP CRID SLAVE MASTER SFACT CAPTOL MU PTYPE MAXAD optional

Example

BSCONP 11 2 5 0.2 2
Field Definition Type Default
CRID Contact region identification number. Integer > 0 Required
SLAVE Slave region identification number. This is the CSID for a BSSEG entry or a generated contact surface. Integer > 0 Required
MASTER Master region identification number. This is the CSID for a BSSET entry or a generated contact surface. Integer > 0 Required
SFACT Stiffness scaling factor. The stiffness scaling factor is used to scale the penalty values. The penalty values are determined automatically. See Remark 4. 0 < Real ≤ 1.0 0.2
CAPTOL Capture tolerance parameter for tied contact pairs. This value is used for tied contact. Regions of opposing contact surfaces within a distance controlled by this parameter are tied together. See Remark 6. Real ≥ 0.0 0.05
MU Coefficient of static friction. Real ≥ 0.0 0.0
PTYPE

Penetration type:

1 = Unsymmetric general contact (slave penetration only)

2 = Symmetric general contact

3 = Unsymmetric welded contact

4 = Symmetric welded contact

1 ≤ Integer ≤ 4 1
MAXAD Maximum activation parameter: See Remark 5. Real ≥ 0.0 0.5

Remarks

  1. The contact region identification number, CRID, must be unique with respect to all other BSCONP identification numbers.
  2. The SLAVE field defines the slave surface by referencing a user defined BSSEG Bulk Data entry or a generated contact surface from a CONTACTGENERATE command. The generated contact surface from a CONTACTGENERATE command uses a CSID that references the PID on a property entry. See the discussion of the CONTACTGENERATE command.
  3. The MASTER field defines the master surface by referencing a user defined BSSEG Bulk Data entry or generated contact surface from a CONTACTGENERATE command. The generated contact surface from a CONTACTGENERATE command uses a CSID that references the PID on a property entry. See the discussion of the CONTACTGENERATE command.
  4. SFACT may be used to scale the penalty values that are computed automatically. Values of SFACT greater than 0.5 are not recommended as they can lead to numerical instability.
  5. MAXAD may be used to prevent unnecessary generation of contact. Contact is only generated if the distance from any contact surface master node to the potential slave node is less than MAXAD * Lc, where Lc is a characteristic segment length determined from the faces on the contact surface.
  6. The value of CAPTOL is used to determine the extent of tied contact during initialization. Regions of opposing contact surfaces that are within a distance CONTACTOL * Lc, where Lc is a characteristic segment length determined from the faces on the contact surfaces, are tied together.
Parent topic: Bulk Data