Lifetime Prediction for Wheel/Track Contact - Creation of a Practical and Theoretical Model

Abstract: Objective: To limit the research time by developing a theoretical model, that can predict the lifetime of a wheel with the help of different input values. Apart from a theoretical model, also create a different type of test rig that can decrease the testing time, and still produce an accurate result similar to a real situation. Method: This Master’s Thesis was based on both an investigatory method and a product development method. Conclusions: With the mathematical model created in the study, it is possible to predict lifetime of a wheel/track combination by imputing data from a short time test with high contact force. Then it will be able to predict how long a test using normal contact forces will last. In addition, it will be possible to optimize the wheel/track to make them smaller if a specific pressure is given. The prototype of the new test rig displays that it is possible to design a lightweight testing rig with the possibility to increase the speed of a wheel/track lifetime testing. The new test rig uses the same carriage wheel and sliding track as present test rig. Moreover, all its components are made with an easy conversion in mind and at minimal cost.