The Study of Physico-Mechanical Properties of Polylactide Composites with Different Level of Infill Produced by the FDM Method

Gaweł, Anna; Kuciel, Stanisław

doi:10.3390/polym12123056

Cited by 15 publications

(12 citation statements)

References 49 publications

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“…As was showed in previous work [ 6 ], the infill density directly affects the mechanical properties. Rahmatabadi et al also showed this dependence.…”

Section: Introductionmentioning

confidence: 59%

“…Fan speed was 20% and the retraction distance was 0.8 mm. According to the properties of polylactide based on DSC research, the temperature of extrusion was 190 °C [ 6 ]. To ensure the proper adhesion of the material the applied heating of the table amounted to 50 °C.…”

Section: Methodsmentioning

confidence: 99%

“…Additionally, the kind of 3D printing table depends on the properties of printed material [ 5 ]. It is extremely important to determine the height of the layer, because it has a direct impact on obtaining sufficiently good strength properties [ 6 ]. It should also be noted that the possibility of using a heating chamber has a huge impact on the correct 3D printing process [ 7 ], as it guarantees the better adhesion of the printed model.…”

Section: Introductionmentioning

confidence: 99%

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Examination of Low-Cyclic Fatigue Tests and Poisson’s Ratio Depending on the Different Infill Density of Polylactide (PLA) Produced by the Fused Deposition Modeling Method

et al. 2023

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This article examines the impact of fatigue cycles on polylactide samples produced by 3D printing using the FDM method. Samples were printed in three infill degree variants: 50%, 75% and 100%. To compere the influence of infill degree on PLA properties, several tests, including the uniaxial tensile test, the low-cycle fatigue test, differential scanning calorimetry (DSC) and scanning electron microscopy (SEM), were conducted. Poisson’s ratio has also been studied. Single hysteresis loops were summed to obtain the entire low-fatigue cycle. The infill of density influenced all compared mechanical parameters. The decrease in infill degree caused the reduction of Young’s modulus and shear modulus. For a 100% degree of sample infill, a higher number of transferred load cycles were observed compared to PLA with 75% and 50% of infill. Additionally, the value of the transferred cyclic load before fatigue failure and the dissipation of mechanical energy was the highest for 100% of infill. It is also worth noting that fatigue tests can positively affect the appearance of the PLA structure. Obviously, it depends on the number of load cycles and the infill density. It causes that if the goal is to transfer as much load as possible over a long period of time, the maximum filling of the printed element should be used.

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“…As was showed in previous work [ 6 ], the infill density directly affects the mechanical properties. Rahmatabadi et al also showed this dependence.…”

Section: Introductionmentioning

confidence: 59%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Examination of Low-Cyclic Fatigue Tests and Poisson’s Ratio Depending on the Different Infill Density of Polylactide (PLA) Produced by the Fused Deposition Modeling Method

et al. 2023

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“…Higher infill densities, such as 100%, led to increased crystallinity compared to lower infill densities . This effect can be attributed to the denser infill structure, which facilitates improved molecular alignment and promotes more efficient nucleation and crystallization . Additionally, the choice of the infill pattern played a crucial role in determining crystallinity.…”

Section: Resultsmentioning

confidence: 99%

Additive Manufacturing of a Super Toughened Biodegradable Polymer Blend: Structure–Property-Processing Correlation and 3D Printed Prosthetic Part Development

Hassan,

Mohanty,

Misra

2024

ACS Appl. Polym. Mater.

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Super toughened polymer materials have garnered significant attention from the scientific and industrial communities due to their vast application potential. However, a notable gap exists in the exploration of additive manufacturing (AM) of biodegradable polymer blends with enhanced impact resistance. This research addresses this gap by investigating the AM of a resilient green blend comprising PLA, BioPBS, and PBAT to achieve an enhanced impact resistance. To characterize the blend, rheological analysis, differential scanning calorimetry, thermomechanical analysis, and mechanical testing were performed. The printing parameters varied were the nozzle temperature, infill density, top and bottom solid layer raster angles, and infill pattern. This study is the first attempt to investigate the impact of the raster angle of top and bottom solid layers, which is important for determining the structural integrity of printed objects. The study revealed that a nozzle temperature of 180 °C, a rectilinear infill pattern, 100% infill density, and solid layers raster angle of 0°resulted in high mechanical properties with a notched Izod impact strength of 489.75 ± 16.6 J/m. Additionally, the study compared the mechanical properties of 3D printed and injection-molded samples. The 3D printed samples demonstrated comparable tensile strength to injection-molded samples, with only a 2% difference, and exhibited higher tensile and flexural moduli, showcasing 8 and 10% increases, respectively. However, there was a 10% decrease in impact strength compared to that of the injection-molded counterparts. These findings indicate that the 3D printed blend offers mechanical properties comparable to injection molding, making it a promising alternative for biomedical applications. A 3D printed leg prosthesis prototype has been developed using the formulated blend at optimized printing conditions.

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“…In the early 1990s, the inventor Stratasys developed a new method for additive manufacturing or 3D printing: Fused Filament Fabrication (FFF) or Fused Deposition Modelling (FDM). FDM technology is based on the creation of parts from the deposition of layers of extruded thermoplastic material on a heated platform [ 3 , 4 ]. It is currently the most widely used additive manufacturing process and is present in a wide range of sectors.…”

Section: Introductionmentioning

confidence: 99%

Impact of In-Soil Ageing Effect on PLA Printed Parts Tensile Properties

2023

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Material extrusion (MEX), more commonly known as fused deposition modelling (FDM/FFF), is one of the most widely used techniques in polymeric Additive Manufacturing (AM). This technology is increasingly present in fields such as engineering and medicine with polymeric materials, including additives of many types. Polylactic acid polymer (PLA) is one of the most widely used materials currently on the market for MEX technology. In addition to its ease of printing, it is a plastic of natural origin, biodegradable and supplants petroleum derivatives in many applications. However, the effect of ageing on the mechanical properties of PLA are still to be evaluated and understood. The main objective of this work is to investigate the effects of ageing of PLA samples on the tensile properties. To investigate the effect of ageing, the samples were tested periodically after exposure to fertilized soil for a period up to 6 months. In addition, some of the samples were chemically pre-treated to improve the surface quality, and the effect of ageing on the treated and untreated samples was also evaluated. This study showed that ultimate strength decreased with ageing from 46 to 36 MPa (22%), and it increased with treatment time in high percentages (even 40%) depending on the time of immersion in the solvent. However, this effect of the chemical treatment gradually disappeared, with the exception of the surface improvement obtained.

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The Study of Physico-Mechanical Properties of Polylactide Composites with Different Level of Infill Produced by the FDM Method

Cited by 15 publications

References 49 publications

Examination of Low-Cyclic Fatigue Tests and Poisson’s Ratio Depending on the Different Infill Density of Polylactide (PLA) Produced by the Fused Deposition Modeling Method

Examination of Low-Cyclic Fatigue Tests and Poisson’s Ratio Depending on the Different Infill Density of Polylactide (PLA) Produced by the Fused Deposition Modeling Method

Additive Manufacturing of a Super Toughened Biodegradable Polymer Blend: Structure–Property-Processing Correlation and 3D Printed Prosthetic Part Development

Impact of In-Soil Ageing Effect on PLA Printed Parts Tensile Properties

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