• PRIYA S
• Dr. S. Somasundaram

Additive manufacturing (AM) is receiving increasing attention because it enables cost- and resource-efficient small-scale production of complex parts. This work characterizes the mechanical behaviour of a tri-fibre laminate produced on a newly developed five-nozzle fused deposition modelling (FDM) printer, in which PETG-CF, ASA and PETG filaments are deposited in separate layer stacks within a single specimen. Three process parameters, layer height (0.15, 0.20, 0.30 mm), printing speed (30, 50, 70 mm/s) and infill density (20, 25, 30 %), were varied using a Taguchi L9 orthogonal array and the responses impact energy, tensile strength, compressive strength and flexural load were measured. Signal-to-noise (S/N) analysis and ANOVA in Minitab 17 show that printing speed is the dominant factor for tensile (56 %) and compressive (48 %) strength while layer height dominates impact energy (49 %); flexural load is insensitive to the chosen process window. The best trial values were 30.12 N/mm² tensile strength, 26.41 N/mm² compressive strength, 3.43 J impact energy and 0.29 kN flexural load. Compared with mono-material specimens, the tri-fibre laminate exceeded PETG-CF, ASA and PETG in compressive strength and impact energy, nearly matched PETG-CF in tensile strength and fell short of PETG-CF in flexural load. Peak tensile strength is associated with the largest PETG fraction, while the largest ASA fraction favours compressive and flexural performance.

Fused deposition modelling, multi-nozzle extruder, PETG-CF, ASA, PETG, Taguchi method, ANOVA, mechanical characterization.

"MECHANICAL CHARACTERIZATION AND TESTING OF MULTI-MATERIAL POLYMER COMBINATION IN 3D PRINTING TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.13, Issue 9, page no.b26-b33, September-2026, Available :http://www.jetir.org/papers/JETIR2609103.pdf

"MECHANICAL CHARACTERIZATION AND TESTING OF MULTI-MATERIAL POLYMER COMBINATION IN 3D PRINTING TECHNOLOGY", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.13, Issue 9, page no. ppb26-b33, September-2026, Available at : http://www.jetir.org/papers/JETIR2609103.pdf