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).