Contact Friction
Description: Defines frictional properties between two bodies in slide line contact.
Format:
Example:
| Field | Definition | Type | Default |
|---|---|---|---|
| FID | Friction identification number. | Integer > 0 | Required |
| FSTIF | Frictional stiffness for stick. See Remark 3. | Real ≥ 0.0 | Model dependent |
| MU | Coefficient of static friction. | Real ≥ 0.0 | 0.0 |
Remarks:
- Friction identification number must be unique with respect to all other BFRIC identification numbers.
- This entry is used in the FRICID field of the BCONP Bulk Data entry.
- The value of frictional stiffness should be chosen carefully. A method of choosing a value is to divide the expected frictional strength (MU * expected normal force) by a reasonable value of the relative displacement which may be permitted before slip occurs. A large stiffness value may cause poor convergence, while too small a value may cause reduced accuracy.