Finite element simulation and experiment of a new ring constrained groove pressing for 5083 aluminum alloy based on cyclic stress state

A new severe plastic deformation process of ring wave repeated groove pressing based on cyclic stress state is proposed. Finite element simulation and process test are carried out on 5083 aluminum alloy sheet during ring wave repeated groove pressing. The deformation mechanism of the sheet and mechanical mechanisms of sheet performance optimization in the process of severe plastic deformation are analyzed. With severe plastic deformation, subjecting the sheet under repeated cycles of tensile stress and strain, compressive stress and strain, the cyclic accumulation of strain is realized, so that the fracture strength and elongation of the processed material are considerably improved. Compared with the original sheet, under the flattening temperature of 300°C and three passes of ring wave repeated groove pressing, the fracture strength and elongation increased by 10 and 75%, respectively.