FEM Simulation of Spot Welding Process (Report I) : Effect of Initial Gap on Nugget Formation(Mechanics, Strength & Structure Design)

概要

論文の詳細を見る
The initial gap between the press formed components of thin plate to be welded by spot welding process is an inevitable problem. A numerical simulation model for spot welding process with initial gap has been constructed and is based on the finite element method as a thermal elasticplastic problem. The contact states and nugget formation of a mild steel were analyzed for spot welding with initial gap. The conclusions show that a ring-like contact state can be formed between electrode and plate under the static squeezing force, and then it will develop from two sides (outside and inside) as welding time increases. The initial formation of the nugget is delayed by the initial gap. The effects of welding current and squeezing force on the nugget formation were investigated.
大阪大学の論文