Learning Forum

[Owen.Law]

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!

[dlooman]

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