To verify the accuracy of our regression model, five representative solutions with different rankings were selected for CF/PEKK and CF/epoxy respectively for experimental validation, and the predicted and experimental values of thrust force, Fda and Tmax are summarized in Table and Table . For CF/PEKK, the mean relative errors between experimental and predicted results are 5.6% for thrust force, 6.0% for delamination factor Fda, and 4.6% for maximum hole wall temperature. For CF/epoxy, the errors are 4.3%, 7.6%, 8.5%