Additive manufacturing (3D printing) is currently undergoing increasing expansion in various industrial fields. Fused deposition modeling (FDM) is the oldest and most widely used additive manufacturing technique. For this latter technique, printing with several materials at the same time has become necessary to obtain the desired mechanical properties, particularly mechanical strength and ductility. In this study, a new approach was developed, consisting in printing a filament using a combination of polylactic acid (PLA) and Thermoplastic polyurethane (TPU), then reusing this filament to print parts. Tensile specimens were printed with this filament, varying the proportion of the two materials and the printing temperature. Tensile tests were carried out on these specimens to measure mechanical properties. The results showed that increasing the TPU content had a negative impact on the stiffness and mechanical strength of the printed parts, whereas it had a positive influence on their ductility. In addition, the printing temperature affects all the mechanical properties of parts printed with composite filament.
Khatir et al. (Fri,) studied this question.
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