PCONTES
Bulk Data Entry Defines Contact Permittance Coefficient (CPC) for CONTACT elements, in electrostatic analysis and piezoelectric analysis.
Format
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| PCONTES | PID | KCPC | KOPC | TPID | TCID |
Example 1
Manual specification of KCPC:
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| PCONTES | 2 | 200.0 |
Example 2
Contact with automatic determination of KCPC:
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| PCONTES | 2 | AUTO |
Data required to request pressure-based contact CPC:
| (1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
|---|---|---|---|---|---|---|---|---|---|
| PCONTES | 2 | 10 |
Definitions
| Field | Contents | SI Unit Example |
|---|---|---|
| PID | Property
identification number. This must match the PID of a PCONT Bulk Data Entry. 1 No default (Integer > 0) |
|
| KCPC | Contact Permittance
Coefficient (CPC) for the closed contact. 2
No default |
|
| KOPC | Contact Permittance
Coefficient for open contact. Default = blank (Real ≥ 0.0) |
|
| TPID | Identification number
of a TABLED# entry. This table specifies
permittance per unit contact area (CPC) based on contact
pressure. 3, 4 Default = 0 (Integer > 0) |
|
| TCID | Identification number
of a TABLED# entry. This table specifies
permittance per unit contact area (CPC) based on contact
clearance. 3, 4, 5 Default = 0 (Integer > 0) |
Comments
- PCONTES provides permittance per unit area for CONTACT elements. The PID of a PCONTES entry should match the PID of an existing PCONT Bulk Data Entry. If the secondary side is specified as grid set, a unit area is assigned to each grid in this set.
- KCPC represents contact permittance values for closed contacts. Contact can be used to connect two parts of dielectric material with different mesh. To facilitate reasonable values for KCPC, automatic calculation (KCPC=AUTO) is supported. This determines the value of KCPC for each contact element using the contact permittance values of surrounding elements.
- TPID points to a TABLED# entry that specifies permittance per unit contact area (CPC) based on contact pressure. Total permittance is the product of the table value and actual contact area. TPID is used when electrostatic analysis uses STATSUB(STRUCTURE) to reference the contact status from a static subcase. TPID overrides KCPC in electrostatic contact analysis.
- TCID points to a TABLED# entry that specifies permittance per unit contact area based on contact clearance. TPID can be specified together with TCID. When TPID is specified together with TCID, contact permittance is determined from the table with TCID for open contact, and from the table with TPID for closed contact (overrides KCPC). TCID overrides KCPC for closed contact if TPID is not present.
- For clearance-based contact permittance table lookup, contact permittance is linearly interpolated within the table range (which should start from zero clearance), and it becomes zero when extrapolated outside the table range.
- For CONTACT interfaces without PCONT, PCONTES is not required. Contact permittance values based on KCPC=AUTO are utilized in such cases.
- For contact with FREEZE status the actual contact status is considered closed in electrostatic analysis.
- If FREEZE is set in the PCONT card, and the main and secondary side of the contact is assigned by permittance material, FREEZE status is automatically assigned to the contact.
- Electrostatic contact analysis via PCONTES and PGAPES is supported for electrostatic analysis and piezoelectric analysis.
- This card is represented as a property in HyperMesh.