Fatigue Modeling and Numerical Analysis of Re-Filling Probe Hole of Friction Stir Spot Welded Joints in Aluminum Alloys

In the present study, fatigue behavior and tensile strength of A6061-T4 aluminum alloy, joined by friction stir spot welding (FSSW), are numerically investigated. The 3D finite element model (FEM) is used to analyze FSSW joint means Abaqus software. determined for joints with both a probe hole refilled hole. order calculate life joints, hysteresis loop first determined, then plastic strain amplitude calculated. Finally, using Coffin-Manson equation, predicted. results were verified against available experimental data from other literature, good agreement was observed between FEM data. showed that joint’s without (refilled hole) higher than Therefore, re-filling an effective method structures jointed subjected static load. re-filled nearly same as structure at low applied loads. Additionally, high load, slightly lower