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Material property question : Resistivity function of moisture concentration

- May 7, 2024 at 2:34 pm
  
  Owen.Law
  Subscriber
  
  Kind help!
  I want to do the electrical and moisture concentration simulation.
  The resistivity is a function of moisture concentration in the material (eg. the wood gets wet by a higher humidity environment and affect its resistivity value ).
  eg. R=Ro*(1-Conc)
  where Conc is concentration.
  How can I write an APDL code for the resistivity material properties which is a function of concentration?
  
  Can we use the command TBFIELD + TBDATA?
  Do you have any example code?
  Many thanks for your kind help!
- May 14, 2024 at 2:59 pm
  
  dlooman
  Ansys Employee
  
  Resistivity can be defined vs concentration with a table: mp,rsvx,,%tabname%
  During solution tables return a value based on the current value of their "primary variable," in this case CONC. Sample commands to create a table are:
  *dim,rsvx_val,table,4,,,CONC !!! table with 4 values for resistivity vs concentration
  rsvx_val(1,0)=1e-3,2e-3,3e-3,4e-3 ! Concentration values (column 0, index column)
  rsvx_val(1,1)=1e-6,2e-6,3e-6,4e-6 ! Corresponding resistivity values (column 1)
  You can edit/display the table in the APDL gui using top toolbar Parameters: Array Parameters> Define/Edit

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