Humping Modelling in Deep Penetration LaserWelding
Deep penetration laser welding is studied at processing speeds leading to the humping phenomenon. Matter melting, vaporization and re-solidification are considered through the implementation of user-defined functions (UDFs) used with a commercial computational fluid dynamics (CFD) Fluent code. The dynamic mesh method implementation allowed us to simulate regular hump formation.
Keywords: Laser welding, deep penetration, keyhole, free surface deformation, computational fluid dynamics (CFD), hump formation