Mechanical and fatigue performance of pressurized vessels fabricated with Multi Jet Fusion™ for automotive applications

Multi Jet Fusion™ (MJF) is a new proprietary form of Additive Manufacturing (AM) from Hewlett Packard (HP) developed to manufacture structures with design and functional complexity while simultaneously providing dramatic increase in the production rate relative other forms polymer-based AM. The increased now enabling more efficient mid-volume products, coupled additional benefits geometric freedom, technology particularly well suited for fabrication complex manifold gas delivery systems. This paper describes comprehensive study evaluate utility MJF maintaining pressures under static dynamic conditions. pressure confinement was applied cylindrical at 345 689 kPa drops were measured real-time. Similarly, fatigue testing performed 105 cycles 1724 kPa, cylinders demonstrated be effective constant both ambient high temperature (90 °C) Additional analyses relevant automotive industry included (a) permeation conducted oxygen carbon dioxide storage performance on printed Polyamide-12 (b) an oil chemical exposure experiment investigate mechanical degradation.