Optimization
You can import tensile test data from file in the form of comma-separated values or, as demonstrated here.
Parameter Estimation
1
In the Study toolbar, click the Optimization button  and choose Parameter Estimation .
2
In the Parameter Estimation study step, locate the Data Source section and input curve_fit_mooney_rivlin.csv as the filename.
3
Setup the first column to be a Parameter column for the lambda parameter and the second column to be Value column for the P variable.
4
Locate the Control Variables and Parameters section and click Add  twice.
5
In the table, enter the following settings:
6
Locate the Parameter Estimation method section and change the method to Levenberg–Marquardt.
7
Change the Least-squares time/parameter method to From least-squares objective.
8
Click the Compute  button.