What does FDM stand for?

FDM stands for Fused Deposition Modelling. This term refers to a popular 3D printing technology that involves the layer-by-layer construction of objects. The process begins with a thermoplastic filament, which is heated to its melting point and extruded through a nozzle to create layers that gradually build up into a three-dimensional shape. The technology is widely used due to its accessibility and affordability, making it suitable for both hobbyists and industrial applications.

The other options do not accurately describe the technology. "Fast Distribution Method" suggests a logistics or delivery process, which is unrelated to 3D printing. "Flexible Design Methods" implies various engineering or design approaches but does not capture the specific nature of the FDM technology. "Fluid Dynamics Modeling" pertains to simulations and analyses of fluid behavior, which is a distinct and unrelated field. Thus, the correct answer directly reflects the specific process used in additive manufacturing.