Characterizing short-fiber-reinforced composites produced using additive manufacturing

By M. Ivey, Garrett W. Melenka, Jason P. Carey, C. Ayranci. 2017

152 citations recorded by the source corpus.

Abstract Material extrusion additive manufacturing (MEAM), a sub-branch of three-dimensional (3D) printing is growing in popularity. Test specimens were 3D-printed using commercial polylactic acid (PLA) filament, and PLA filament reinforced with short-carbon fibers (PLA/CF). As-printed specimens and specimens that were annealed at three different temperatures, then subjected to tensile testing. The internal microstructures of the samples were also examined. The effects of the short-carbon fiber fillers on the mechanical properties of 3D-printed PLA were investigated, and the effects of the annealing process on polymer crystallinity and mechanical properties. The annealing process was shown to increase the crystallinity of both sample groups, though no statistically significant effect of annealing on mechanical properties was observed. The tensile properties of the PLA and PLA/CF filaments showed that the addition of carbon fibers to the PLA filament led to a significant increase in elastic modulus of the MEAM samples.

Subfields: Automotive Engineering, Biomedical Engineering

View Paper: https://www.semanticscholar.org/paper/b69aaa8c6b3e85666d5583c3a4adaf65a8cb225b

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In Automotive Engineering

In Biomedical Engineering

Citations in the corpus

3D-Printed Carbon Fiber Reinforced Polymer Composites: A Systematic Review (2020, methodology): “Halpin–Tsai has been used for transverse and shear properties of 3D printed part with reasonable accuracy [9,35,40].”
Fused Deposition Modelling of Fibre Reinforced Polymer Composites: A Parametric Review (2021, methodology): “General thermoplastics have low nucleation and crystallinity rates, so they cannot form a crystalline structure in a short time, this can reduce the part strength when printing without heated bed [12,43].”
Recycling of fiberglass wind turbine blades into reinforced filaments for use in Additive Manufacturing (2019, background): “As a result, the degree of crystallinity of a substance can be expressed as 𝜆𝑐= ∆𝐻𝑚−∆𝐻𝐶 ∆𝐻𝑓(1−𝑊𝑓) × 100, (2) where ∆𝐻𝑚 is the enthalpy of fusion, ∆𝐻𝐶 is the enthalpy of cold crystallisation, ∆𝐻𝑓 is the enthalpy of fusion of 100% crystalline PLA, which is selected to be 93.1 J/g [40],”