tbft

Mapdl.tbft(oper='', id_='', option1='', option2='', option3='', option4='', option5='', option6='', option7='', **kwargs)

APDL Command: TBFT

Performs material curve-fitting operations.

Parameters
oper

The specific curve-fitting operation:

Define a constitutive model. - Delete a constitutive model.

Write data related to a constitutive model to the database (same as TB command). - Initialize coefficients of a constitutive model for nonlinear curve-fitting

procedure.

Deletes coefficients at current reference temperature. Applicable only for temperature dependent coefficients. - Solve for coefficients.

Fix (hold constant) the coefficient you specify in Option4. - Add experimental data.

Delete experimental data. - List all data associated with the material model represented by the material ID

number.

id_

The material reference number (same as MAT argument used in the TB command). Valid entry is any number greater than zero (default = 1) but less than 100,000.

option1

For curve-fit function operations (Oper = FADD, FDEL, FSET, SET, CDEL, SOLVE or FIX) this field specifies the category (HYPER).

option2

For curve-fit function operations (Oper = FADD, FDEL, FSET, SET, CDEL, SOLVE, or FIX), this field specifies constitutive model type. The valid entries are listed in Table 231: Hyperelastic Options below.

option3

For Oper = FADD, FDEL, FSET, CDEL, SET, SOLVE or FIX, some of the cases specified in Option2 will require that the polynomial order be specified. The applicable values for the order specification are listed in Table 231: Hyperelastic Options.

option4

When you are working on a specific coefficient (Oper = FIX), this field specifies the index of that coefficient. Valid entries vary from 1 to n, where n is the total number of coefficients (default = 1).

option5

When you are working on a specific coefficient (Oper = FIX), this field specifies the index of that coefficient. Valid entries vary from 1 to N, where N is the total number of coefficients (default = 1)

option6

If Oper = SOLVE, specifies the allowed tolerance in residual change to stop an iteration. Valid entry is 0.0 to 1.0 (default = 0.0).

option7

If Oper = SOLVE, specifies the allowed tolerance in coefficient change to stop an iteration. Valid entry is 0 to 1 (default = 0).