Experimental investigation on mechanical properties of FFF parts using different materials

Djokikj, Jelena; Tuteski, Ognen; Doncheva, Elisaveta; Hadjieva, Bojana

doi:10.1016/j.prostr.2022.05.076

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…This is explained by the same effect: for lower layer thicknesses, the lower deformation is caused by the greater cohesion between the layers, and in higher layer heights, it is the opposite; this is presumably caused by the lower density of the part due When examining the fracture images of the tested specimens, a brittle fracture pattern is evident in PETG (Figure 13a), representing a failure caused by the individual filament failures within the specimen. This characteristic failure mode is distinctive in Additive Manufacturing [37][38][39][40]. However, in the case of the reinforced specimen, a more ductile failure is observed (Figure 13b), clearly influenced by the movement of the reinforcements within the material matrix.…”

Section: Resultsmentioning

confidence: 90%

“…When examining the fracture images of the tested specimens, a brittle fracture pattern is evident in PETG (Figure 13a), representing a failure caused by the individual filament failures within the specimen. This characteristic failure mode is distinctive in Additive Manufacturing [37][38][39][40]. However, in the case of the reinforced specimen, a more ductile failure is observed (Figure 13b), clearly influenced by the movement of the reinforcements within the material matrix.…”

Section: Resultsmentioning

confidence: 90%

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Mechanical and Tribological Performance of Carbon Fiber-Reinforced PETG for FFF Applications

Batista,

Lagomazzini,

Ramirez-Peña

et al. 2023

Applied Sciences

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With the increasing adoption of Additive Manufacturing in the industry, driven by its efficiency, productivity, and project profitability, materials have undergone significant evolution to enhance process performance and part properties. One of the processes employed to enhance these properties involves the incorporation of various types of reinforcements. This aims to ensure that the material acquires a proportion of the properties of the added reinforcement. Consequently, the options for material selection expand depending on the application. Hence, there is a need to understand how specific reinforcements modify the properties of these materials. For this reason, this study investigates the modification of mechanical properties in a PETG matrix through the incorporation of short carbon fiber (CF) reinforcements, driven by their industrial relevance. To achieve this, the Fused Filament Fabrication (FFF) process will be utilized to produce a series of standardized specimens made of both PETG and CF-reinforced PETG, with variations in layer height and extrusion temperature. Subsequently, these specimens will undergo mechanical evaluation in tension and compression, following the relevant standards for each case. Finally, distinctions between both materials will be analyzed, based on the data obtained from tensile and compression tests. The incorporation of carbon fiber reinforcement shows a detrimental effect, leading to a decrease in the material’s stress (39.23 N/mm2 vs. 48.41 N/mm2 for the conventional material). As expected, due to the nature of the reinforcement (short fibers), the deformation of the material also decreases (2.13% compared to 2.9%).

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Section: Resultsmentioning

confidence: 90%

Section: Resultsmentioning

confidence: 90%

Mechanical and Tribological Performance of Carbon Fiber-Reinforced PETG for FFF Applications

Batista,

Lagomazzini,

Ramirez-Peña

et al. 2023

Applied Sciences

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show abstract

“…Variation in the used materials is also influencing the mechanical properties and therefore is element that researchers are exploring. Djokikj et al [3] compared three different polymers (PC -polycarbonate, PETG -polyethylene terephthalate glycol, PLA -polylactic acid) in their studies. According to their results, PC specimens have the highest values for the UTS (ultimate tensile stress), right before PLA and PETG specimens.…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength of 3D Fabricated Parts: Experimental and Numerical Studies

Djokikj,

Avramov,

Nestorovski

et al. 2024

TEM Journal

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Additively manufactured (AM) parts have mechanical properties that differ from the ones of the traditionally manufactured parts. The difference in the mechanical properties is due to the AM’s specific working manner of adding the material in layers. By consulting the available literature on this matter, it is concluded that most of the research papers are concerning the tensile strength of the parts leaving only a small number of papers dealing with the compressive strength of the parts. The aim of the paper is to make contribution in this particular research area. As an AM process we are using the fused filament fabrication (FFF) process and polylactic acid (PLA) material. The study also explores the influence of the infill pattern on the compressive stress of the parts. Samples are designed and tested according to the ISO 604 standard. Three samples size 25x25x25 mm were tested on SHIMADZU AG-X 250 kN for the experimental study and in LS-Dyna and HypeMesh for the numerical study. Results showed correlation between the results in the experimental and numerical study. Lowest values for the compressive strength were achieved by the concentric infill samples. This is one addition in the studies correlating the process parameters to the mechanical properties. These types of studies are valuable input in the design process and material selection process for a particular application.

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Insights into Flexural and Impact Properties of Polymer Based Materials Printed Through Fused Filament Fabrication: Progress in The Last Decade

Khan,

Hassan,

Ahmed

et al. 2024

International Journal of Lightweight Materials and Manufacture

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Experimental investigation on mechanical properties of FFF parts using different materials

Cited by 6 publications

References 11 publications

Mechanical and Tribological Performance of Carbon Fiber-Reinforced PETG for FFF Applications

Mechanical and Tribological Performance of Carbon Fiber-Reinforced PETG for FFF Applications

Compressive Strength of 3D Fabricated Parts: Experimental and Numerical Studies

Insights into Flexural and Impact Properties of Polymer Based Materials Printed Through Fused Filament Fabrication: Progress in The Last Decade

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