Numerical analysis of material flow in the probeless friction stir spot welding based on Coupled Eulerian-Lagrangian approach. (December 2018)

• Record Type: Journal Article
• Authors: Chu, Q.; Yang, X.W.; Li, W.Y.; Vairis, A.; Wang, W.B.
• Is Part Of: Journal of manufacturing processes. Volume 36(2018)
• Page Start: 181
• Page End: 187
• Publication Date: 2018-12
• Subjects: Probeless friction stir spot welding -- Aluminum-lithium alloy -- Numerical analysis -- Material flow; Production management -- Data processing -- Periodicals; Manufacturing processes -- Periodicals; Procestechnologie; Productietechniek; Production -- Gestion -- Informatique -- Périodiques; Fabrication -- Périodiques; Manufacturing processes; Production management -- Data processing; Periodicals; 670.5
• DOI: 10.1016/j.jmapro.2018.10.013
• Languages: English
• ISSNs: 1526-6125

Abstract

Abstract: AA2198 joints were produced using the probeless friction stir spot welding (P-FSSW). Numerical modeling of the process based on the Coupled Eulerian-Lagrangian technique was developed to investigate the material flow. The modeling and experimental observations provide a consistent interpretation of the circumferential material flow which has some inward radial flow at the top surface. As the welding process advances, the flow is directed downwards, producing a spiral contracting pattern. The simulation results show that the hook defect is formed as the material in the bottom sheet is squeezed upwards in a symmetrical fashion with respect to the centerline, matching well with the experimental results.