PCONTEC

Bulk Data Entry Defines Contact Electric Coefficient (CEC) for CONTACT elements in electrical analysis.

Format

(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
PCONTEC PID KCERC              

Examples

Manual specification of KCERC:
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
PCONTEC 2 200.0              
Automatic determination of KCERC:
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10)
PCONTEC 2 AUTO              

Definitions

Field Contents SI Unit Example
PID Property identification number. 1

No default (Integer > 0)

  
KCERC Contact Electric Coefficient (CEC) for the closed contact. 2
Real ≥ 0.0
AUTO

No default

  

Comments

  1. PCONTEC provides resistance per unit area for CONTACT elements. The PID of a PCONTEC entry must match that of an existing PCONT Bulk Data Entry.

    If the secondary side is specified as grid set, then you can assume that a unit area is assigned to each grid in this set.

    Resistance per unit area is in the same unit as electric coefficients, also called contact ER (Electrical Resistance). Total conductance is calculated as contact area divided by KCERC.

  2. KCERC represents Contact Electrical Resistance values for closed contacts. Theoretically, while lower Contact Electric Resistance values enforce a perfect conductor, excessively low values may cause poor conditioning of the conductance matrix. If such symptoms are observed, you may need to reduce the value of Contact Electrical Resistance.

    To facilitate reasonable values for KCERC, automatic calculation (KCERC=AUTO) is supported. This determines the value of KCERC for each contact element using the contact electric conductance values of surrounding elements.

  3. PCONTEC is not supported for surface-to-surface contact (DISCRET=S2S on CONTACT/TIE).
  4. For CONTACT interfaces without PCONT, PCONTEC is not required. Contact Electrical Resistance values based on KCERC=AUTO is utilized in such cases.
  5. Electrical contact with FREEZE status uses the actual contact status (open or closed) based on geometry.
  6. Electrical Contact Analysis via PCONTEC and PGAPEC is supported for Steady-State Electric Analysis and Multi-Steady Electric Analysis.
  7. This card is represented as a property in HyperMesh.