On the numerical treatment of heat sources in laser beam welding processes

Laser beam welding is a contact free fusion technique which has gained importance during the last years due to rising need for automatization in industrial processes. However, well-known problem formation of solidification cracks rear region melting pool. In order investigate highly dependent on chemical composition, speed, weld intensity and resulting temperature gradient material, modeling laser as heat source plays prominent role. sources welding, this contribution compares two methods, Goldak model second that mimics melt pool with idea an isothermal region. Suitable boundary value problems show differences methods are demonstrated.