This video shows a small fabrication of 1″ sch 10 316 stainless pipe and fittings that are being welded by me when I was welding in a shop in the Dallas area earlier this year.
Fluid-structure coupled simulation. Highlights: high-speed multi-phase flow, detonation, fluid-structure interaction, fracture, crack propagation. Crack propagation is simulated using XFEM. Two other animations from the same simulation: