Investigating compression strengths of 3D printed polymeric infill specimens of various geometries

Subeshan, Balakrishnan; Alonayni, Abdullah; Rahman, Muhammad M.; Asmatulu, Eylem

doi:10.1117/12.2296651

Cited by 17 publications

(8 citation statements)

References 10 publications

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“…The results of the impact tests of printed samples made of pure polylactide also show that the elongated structure with a higher degree of filling generally has better impact properties compared to the honeycomb structure. The study by Subeshan, Balakrishnan et al on the effect of filling density confirms our observations of a decrease in impact strength with a decrease in the filling density of the tested objects [ 38 ]. The differences in the impact strength of the tested samples in relation to the reference samples are presented in Table 8 .…”

Section: Resultssupporting

confidence: 91%

Molybdenum Disulphide Modified Polylactide for 3D Printed (FDM/FFF) Filaments

et al. 2023

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MoS2 is an additive used to improve the tribological properties of plastics. In this work, it was decided to verify the use of MoS2 as a modifier of the properties of PLA filaments used in the additive FDM/FFF technique. For this purpose, MoS2 was introduced into the PLA matrix at concentrations of 0.025–1.0% by weight. Through extrusion, a fibre with a diameter of 1.75 mm was obtained. 3D printed samples with three different filling patterns were subjected to comprehensive thermal (TG, DSC and HDT), mechanical (impact, bending and strength tests), tribological and physicochemical characteristics. The mechanical properties were determined for two different types of fillings, and samples with the third type of filling were used for tribological tests. Tensile strength has been significantly increased for all samples with longitudinal filling with improvement up to 49%. In terms of tribological properties, higher values of the addition (0.5%) caused a significant increase of up to 457% of the wear indicator. A significant improvement in processing properties in terms of rheology was obtained (416% compared to pure PLA with the addition of 1.0%), which translated into more efficient processing, increased interlayer adhesion and mechanical strength. As a result, the quality of printed objects has been improved. Microscopic analysis was also carried out, which confirmed the good dispersion of the modifier in the polymer matrix (SEM-EDS). Microscopic techniques (MO, SEM) allowed for the characterization of the effect of the additive on changes in the printing process (improvement of interlayer remelting) and to assess impact fractures. In the tribological area, the introduced modification did not bring spectacular effects.

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Section: Resultssupporting

confidence: 91%

Molybdenum Disulphide Modified Polylactide for 3D Printed (FDM/FFF) Filaments

et al. 2023

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“…In their research, they achieved better compression performance for samples with a triangular infill pattern compared to line type infill. [38] emphasize that the compressive properties of 3D-printed materials (such as PLA) depend on the infill patterns and infill percentages; these factors influence the mechanical properties of the parts.…”

Section: Compression Testing: Shape Solid Sample Variations Of Infill...mentioning

confidence: 99%

Effect of Infill Parameters and Nano-Reinforcement on Compression Performance of 3D Printed Polylactic Acid

Farias,

Oliveira,

Quaresma

et al. 2024

Preprint

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With the advancement of Additive Manufacturing and its applications in various industrial segments, it becomes increasingly important to investigate the processability parameters associated with nano-reinforcement. This study examines the influence of infill parameters, such as patterns (hexagonal, triangular and concentric), shape (solid and honeycomb) and concentrations by mass of Carbon Nanotubes (CNTs) at 1.0 wt% and 2.0 wt% on the mechanical compression properties of the 3D printed material. In this sense, nanocomposites based on Polylactic Acid (PLA) matrix nano-reinforced by CNTs were characterized using the Scanning Electron Microscopy -SEM, X-ray Diffraction, Raman Spectroscopy techniques and mechanical analysis. The mechanical properties of both the matrix and the nanocomposites were determined through mechanical compression tests, in accordance with [1]. SEM revealed compacted regions, voids, and detachment in the structures. XRD characterization indicated PLA predominantly amorphous nature, while CNTs exhibited characteristic diffractions of carbon nanotubes. Raman characterization showcased bands and characteristic vibrations of CNTs and PLA, nanocomposites' vibrational modes combine those of CNTs and PLA. Mechanical compression analysis indicates a direct influence of infill pattern, shape, and nano-reinforcement. The triangle pattern outperformed other patterns, exhibiting a 15.03% increase compared to concentric and 8.8% compared to hexagon infill. In nanocomposites, all showed higher compressive strength than the matrix. For PLA/1.0%CNTs, strength was 16.8%, and for PLA/2.0%CNTs, it reached 39.2%. In honeycomb shapes with infill variations, the triangular pattern excelled with a 0.97% increase over concentric and 6.12% over hexagon patterns. Honeycomb results indicate a 59.6% increase for (PLA/1.0%CNTs) and a 0.48% increase for (PLA/2.0%CNTs) compared to the matrix. This study highlights 3D printing parameters, emphasizing the effectiveness of the triangular pattern and the enhanced strength with the addition of CNTs, providing insights to enhance products manufactured through Additive Manufacturing.

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“…Properties of the CFRC influence its impact behavior. [33][34][35][36][37] Thickness of the plies, total number of plies, material characteristics of the fiber and matrix, and orientation of the ply are the main properties of the CFRC that influence impact behavior. It has been shown that the thickness and ply orientation of the CFRC can resist a large amount of damage from a drop-weight impact.…”

Section: Impact Damage In Carbon Fiber-reinforced Compositesmentioning

confidence: 99%

Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

Bayazeid

Poon²,

Subeshan

et al. 2021

Journal of Composite Materials

Self Cite

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Carbon fiber–reinforced composites (CFRCs) have been used extensively in structural applications within the aerospace and automotive manufacturing industries. However, several other applications have been recognized. These take advantage of the additional properties of CFRCs, which lead to providing better performance for structures. However, in their service environment, these CFRCs are inevitably susceptible to impact damage from multiple sources, and they must be able to recover from impacts to meet structural requirements. This study directs an experimental investigation of using induction heating (IH) for an impact-damaged CFRC. Here, IH process parameters, including the effects of electromagnetic frequency and generator power on the recovery of impact-damaged CFRC, have been analyzed. The anisotropic conductivity characteristics and the relationship between the drop-weight impact depth and conductivity of CFRC garnered much attention. This paper also offers the electromagnetic properties of CFRC for various applications. In this study, CFRC cured samples were obtained from Cetex® TC1200 PEEK, AS4 145 gsm, 16 unidirectional plies. Three variants of CFRC samples were tested: undamaged samples; samples with impact damage introduced in the center by a drop-weight impact test, according to the ASTM D7136/7136M standard; and samples with drop-weight impact damage recovered using the IH system. This work presents the results of the tensile strength of CFRC samples to assess the comparison of undamaged samples, samples damaged after the drop-weight impact test, and samples recovered after the drop-weight impact test. IH is appropriate for the recovery of impact-damaged CFRC samples, aiding in the conversion of electromagnetic energy to heat in order to generate mechanisms on components to recover the impact-damaged CFRC samples. Experimental results show that the impact-damaged area of the recovered CFRC samples is 37.0% less than that of damaged CFRC samples, and tensile strength results also improved after the impact-damaged CFRC samples were recovered. These results show that the IH method can effectively improve the impact damage performance of CFRC. The outcome of this study is promising for use in many applications, especially in the aerospace and automotive industries.

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Investigating compression strengths of 3D printed polymeric infill specimens of various geometries

Cited by 17 publications

References 10 publications

Molybdenum Disulphide Modified Polylactide for 3D Printed (FDM/FFF) Filaments

Molybdenum Disulphide Modified Polylactide for 3D Printed (FDM/FFF) Filaments

Effect of Infill Parameters and Nano-Reinforcement on Compression Performance of 3D Printed Polylactic Acid

Recovery of impact-damaged carbon fiber–reinforced composites using induction heating

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