Material Calibration Model Reference
This model takes input tables of experimental rheological data and performs material calibration curve fitting on the data, and fills in the model parameters for a generalized Newtonian model, a viscoelastic fluid model, or the Chemorheology model based on the curve derived from the data.
| Theory | See Non-Newtonian Fluids. | ||
| Provided By | |||
| Example Node Path | |||
| Requires |
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| Specific Right-Click Actions | Right-click on the Material Calibration model and select Fitting Tool... to open the Material Parameter Fitting dialog window. See Material Calibration Workflow. | ||
| Activates | Model Controls (child nodes) | See Creating the Simulation and Importing the Experimental Data. | |
Material Calibration Inputs
The Material Calibration model uses tables in .csv format as inputs. These tables contain the experimental rheological data used to calculate model parameters.
Input Table Properties
- Active
- When On makes the data table for this node active and available for the fitting tool. When Off, the data table and curve are displayed without any effect on fitting.
- Exponential Data
- When On, the default, makes a least squares fit using the logarithm of the original data. This approach improves the quality of the material fit when the original data is exponential in character. When Off, only the original data is used. Off is the default.
- Data Table
- Provides a drop-down menu of available data tables. Tables must have been imported previously under . They must have two or three columns and be in .csv format.
- Input Type
- Specifies the meanings of the columns of the input table and so defines the rheological data type.
Input Type First Column Second Column Third Column Shear Rate - Shear Stress Shear rate Shear stress Shear Rate - Shear Viscosity Shear rate Shear viscosity Shear Rate - N1 Shear rate N1, the first normal stress difference Shear Rate - N2 Shear rate N2, the second normal stress difference Frequency - G' G" The frequency at which the storage and loss moduli are measured Storage Modulus Loss Modulus Time - Planar Elongational Viscosity Physical time Planar elongational viscosity Time - UniAxial Elongational Viscosity Physical time Uniaxial elongational viscosity Time - BiAxial Elongational Viscosity Physical time Biaxial elongational viscosity Time - Curing Variable Physical Time Degree of cure Strain - Planar Elongational Viscosity Strain Planar elongational viscosity Strain - UniAxial Elongational Viscosity Strain Uniaxial elongational viscosity Strain - BiAxial Elongational Viscosity Strain Biaxial elongational viscosity Strain Rate - Planar elongational viscosity Strain rate Planar elongational viscosity Strain Rate - UniAxial Elongational Viscosity Strain rate Uniaxial elongational viscosity StrainRate - BiAxial Elongational Viscosity Strain rate Biaxial elongational viscosity
Temperature Specification
A Temperature Specification node appears under each Input Table n node. The temperature at which measurements in the input table were taken. The default value is 300 K.
Rate Specification
The rate of elongation at which measurements were taken. A Rate Specification node appears under the Input Table n node when Input Type is one of the Time or Strain selections. The default value is 0.0 /s; enter a positive value.