Investigation of Fatigue Lives of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets Based on Fracture Mechanics 2005-01-1250
The fatigue lives of spot friction welds in lap-shear specimens of aluminum 6111-T4 sheets are investigated here. The paths of fatigue cracks near spot friction welds are first discussed. A fatigue crack growth model based on the Paris law for crack propagation and the local stress intensity factors for kinked cracks is then adopted to predict the fatigue lives of spot friction welds. The global and local stress intensity factors based on a recent work of Wang and Pan for resistance spot welds in lap-shear specimens are used to estimate the local stress intensity factors of kinked cracks with experimentally determined kink angles. The results indicate that the fatigue life predictions based on the Paris law and the local stress intensity factors as functions of the kink length agree well with the experimental results.
Citation: Lin, P., Pan, J., and Pan, T., "Investigation of Fatigue Lives of Spot Friction Welds in Lap-Shear Specimens of Aluminum 6111-T4 Sheets Based on Fracture Mechanics," SAE Technical Paper 2005-01-1250, 2005, https://doi.org/10.4271/2005-01-1250. Download Citation
P.-C. Lin, J. Pan, T. Pan
Department of Mechanical Engineering, the University of Michigan, Ford Research and Advanced Engineering, Ford Motor Company
SAE 2005 World Congress & Exhibition
Welding-SP-1959, SAE 2005 Transactions Journal of Materials and Manufacturing-V114-5