Process parameter tailored evaluation of FFF-fabricated carbon fibre based poly-lactic-acid composites

Abstract

Fused filament fabrication (FFF) is an Additive manufacturing technique, widely used in engineering that involves adding material layer by layer to create solid objects with complex geometry. Due to the poor mechanical performance of pure thermoplastics materials, one alternative for enhancing the mechanical qualities of FFF created thermoplastic parts is to include reinforcing material, such as carbon fibre (CF). In this work, we perform an FFF analysis of the mechanical behaviour of gyroid infilled CF based poly-lactic-acid (PLA) composites. Tensile behaviour is measured for a variety of parameter combinations, including raster angle (RA) (0°, 45°, 90°), feed rate (FR) (20 mm/s, 40 mm/s, 60 mm/s) and layer height (LH) (0.1 mm, 0.15 mm, 0.2 mm). By adjusting the several process parameters, it is possible to increase tensile strength (TS) by 70.81%, from a minimum of 16.17 MPa to a maximum of 27.62 MPa. The failure mechanisms of the studied specimens are determined using a fractography study, which indicates pulling, necking, raster failure, and voids. Using ANOVA, Taguchi’s L27 array, and regression analysis, the impact of LH, RA, and FR on TS is determined, in which, LH having the highest influence. The results of this study will aid engineers in creating useful components with improved mechanical behaviour.

Microstructure and mechanical properties of filament and fused deposition modelling printed polylactic-acid and carbon-fiber reinforced polylactic-acid

“…Fiber-pull out as the major mode of damage has been previously confirmed by number of researchers. 5,80…”

Hybrid multi-scale modeling of fused deposition modelling printed thermoplastics: An introduction to material degradation parameter

“…El Magri et al 12 also noted that specific orientations, such as [0°, 15°, −15°] relative to the test bar's long axis, yielded the highest tensile properties. Similarly, Jain et al 13 observed that tensile characteristics improve as the raster angle decreases from 90° to 0°. Şık et al 14 investigated the tensile behaviour of ABS, examining various raster and build orientations through experimental and analytical methods.…”

Augmenting the flexural strength of polymer composites for stronger and more durable prosthetic sockets

“…15 Although they combine the greatest qualities of each distinct component, hybrids function better than their individual elements and have the potential to make prostheses for amputees. 16 To increase its structural, conductive, and thermal properties, polymers can be reinforced with substances like continuous-flax, 17 Basalt fiber, 18 SWCNTs, MWCNTs, [19][20][21] and CF. [22][23][24][25][26][27][28][29] Carboncontaining reinforcing polymer nano-composites have a significant positive impact on the physical and mechanical characteristics of specimens.…”