Finite Element Analyses of Conventional Single Point Incremental Forming and Friction Stir Incremental Forming of Aluminum Alloy Sheets

摘要

Friction stir incremental forming process for formingA5083 aluminum alloy sheets was calculated by finite elementmethod. Conventional incremental forming process was alsocalculated and the both calculated results about distributions oftemperature, plastic strain and deformation after springbackwere compared each other. Metallurgical change was not takeninto account in the calculation. The maximum temperatures ofsheet during forming in friction stir incremental forming andconventional incremental forming were 380 o C and 60 o C,respectively. Both distributions of equivalent strain in frictionstir incremental forming and conventional incremental formingwere almost uniform, however, absolute value in friction stirincremental forming was greater due to the shear strainintroduced by tool rotation. Displacement in Z-direction byconventional incremental forming was uniform, however, thatby friction stir incremental forming was not uniform since thetemperature difference between during and after forming waslarge.