Integral Approach for Endurance Limit Evaluation on Shrink-Fitted Assemblies

The endurance limit of shrink-fitted assemblies subjected to rotating bending as well as to dynamic torque loading is investigated experimentally as well as numerically. The presented integral approach includes statistical evaluation methodology for fatigue tests (staircase method). Furthermore the experimental results are compared with endurance limit calculation algorithm according to German standard DIN 743. In addition, further fatigue parameters (SWT and FS) are evaluated in a numerical simulation using a critical plane method. The FS parameter shows a good compliance for both loading cases. Nevertheless occurring tribological damage (fretting) and its influence on the fatigue properties have to be studied more in detail in future studies.