Learning Forum

[farhat.lamisa]

Hello,

I am trying to define failure criteria for an orthotropic material (carbon fiber) using the SOLID185 element. I have defined the elastic properties with the MP commands, and now I am trying to define the strength limits using the TB,FC command.

When I run my script, I get the error: "Unknown table label FC. The TB command is ignored." This is immediately followed by errors saying "No table is active" for my TBDATA commands.

My code for the material definition is:

ET,1,SOLID185
MAT,1

! Elastic Properties (in Pascals)
MP,EX,1,230E9
... (and so on for all MP commands)

! Failure Criteria (This is where the error occurs)
TB,FC,1
TBDATA,1, 3500E6, 3000E6
... (and so on for all TBDATA commands)

My questions are:

Why is the FC table label not recognized for the SOLID185 element in my case? Is this a limitation of the ANSYS license I am using (e.g., Student or Mechanical Pro)?

If TB,FC is not available, what is the recommended alternative method for defining failure criteria or progressive damage for an orthotropic solid element like this?

Thank you for your help.