This four part assembly model has two rubber parts modeled using a hyperelastic material model. Students import experimental data into the Workbench Engineering Data module and curve fit it to create Mooney-Rivlin constants. Initially the model does not converge, and students must modify the model to get it to converge. The model also provides an opportunity for students to experiment with different nonlinear contact formulations including pure penalty, augmented Lagrange, and normal Lagrange.