Friction coefficient of additively manufactured polymeric parts

Abstract

This article shows the studies performed in order to determine, by means of experimental procedures, the friction properties of pieces additively manufactured with thermoset polymeric filaments. The experimental procedures are based on an alternative to the classical inclined plane test, although with a test rig of own design. With this procedure, it is possible to determine the dynamic friction coefficient. Ad-hoc specimens of own design are proposed to evaluate various features of surface finishing, materials, etc., which affect the variation of the friction coefficient in printed parts. The test specimens are constructed with 3 common types of filaments employed in 3D printing by the filament deposition method (FDM). Particularly Polylactic Acid (PLA), High Impact Poly Styrene (HIPS) and Polyethylene Terephthalate modified with Glycol (PETG) are evaluated.