Evaluating the hole quality produced by vibratory drilling: additive manufactured PLA+

Baraheni, Mohammad; Shabgard, Mohammad Reza; Amini, Saeid

doi:10.1007/s00170-021-07750-8

Cited by 14 publications

(3 citation statements)

References 34 publications

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“…The comparison was carried out in terms of the delamination factor, the cylindricity of the delaminated areas, and the circularity of the drilled holes; consequently, it was suggested that the feed rate value has a kind of directly proportional relationship with the delamination factor, while increasing the cutting speed affected such proportionality. This observation contrasts with the results obtained in a previous study on polylactic acid (PLA) drilling, where cutting speed did not appear to have a significant effect on the delamination factor [59]. It may be suggested that the presence of natural fibers produced this effect, which was likely due to the nonuniformity of their local properties, suggesting that limiting the time that the material is in contact with the tool via increasing the drilling speed might also reduce the extent of the damage.…”

Section: Main Parameters Influencing Drilling Of Natural Fiber Compos...contrasting

confidence: 99%

Drilling Parameters and Post-Drilling Residual Tensile Properties of Natural-Fiber-Reinforced Composites: A Review

et al. 2023

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This review highlights the influence of parameters on the drilling characteristics of biocomposites including natural fibers. The particular structure of natural fibers, including their hierarchized geometry, which potentially causes fibrillation, can result in an increased chance of irregularity of the hole and a more complex mode of delamination or, in general terms, damage to the composite. On the other hand, to attain an effective junction of the laminates in a structure, a nut–bolt procedure must be selected, which requires the performance of a drilling operation. This is becoming increasingly important since the fields of application for natural fibers and their variety have been steadily growing in the last few decades. Additionally, adequately performed drilling operations can address considerations related to circular economy. The drilling characteristics evaluated herein include thrust force, torque, surface roughness, and the delamination factor at the entry and exit of the drilling tool. The variation in tensile strength, stiffness, and strain propagation due to the presence of open holes of various sizes, the number of holes, the holes’ patterns, the effect of the type of fiber of the notches, the fiber architecture, and the fibers’ stacking sequence in biocomposites have also been discussed.

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Section: Main Parameters Influencing Drilling Of Natural Fiber Compos...contrasting

confidence: 99%

Drilling Parameters and Post-Drilling Residual Tensile Properties of Natural-Fiber-Reinforced Composites: A Review

et al. 2023

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“…The material properties, specific print parameters inherent to each material, as well as the achieved sample sizes, are characterised in Table I. This study employs the most common thermoplastic materials used in FDM, namely: (i) ABS (acrylonitrile butadiene styrene), characterised by its high impact and heat resistance [15]; (ii) PLA (polylactic acid), for its ease of printing [16] and low shrinkage, achieving the closest dimensions compared to the intended ones in Table I; (iii) PLA+, an enhanced version of PLA with increased strength to weight qualities [17]; and (iv) PETG (Polyethylene terephthalate glycol), a co-polymer combining the best features of PLA (low shrinkage) and ABS (high impact resistance) [18].…”

Section: Methodology a Materials And Manufacturingmentioning

confidence: 99%

Infill Density in Additive Manufacturing and Application to the DFMA of an Iron Man Helmet

Vraitch,

Prince,

Souppez

2023

2023 28th International Conference on Automation and Computing (ICAC)

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Additive manufacturing has become increasingly popular for rapid prototyping and industrial applications, particularly in the context of Industry 4.0. However, given the vast design parameter space, there remains a lack of characterisation of the mechanical properties for varying design parameters. Consequently, flexural tests are undertaken following the ISO 178:2019 for fused deposition modelling (FDM) samples, with three infill patterns (lines, gyroid and triangles), four thermoplastic materials, namely acrylonitrile butadiene styrene (ABS), polylactic acid (PLA and PLA+), and polyethylene terephthalate glycol (PETG), and infill densities (print material to part volume ratio) ranging from 0.10 to 1.00. Here we show that (i) the modulus and strength are independent of the tested infill types; (ii) the mechanical properties increase linearly with infill density; and (iii) considering mechanical properties, mass and cost, PLA+ appears as the most suitable overall material choice, with PETG appropriate for strength-driven, low-cost applications. Ultimately, PLA+ is applied to the design for manufacturing and assembly (DFMA) case study of an Iron Man helmet. These findings provide novel insights into the variations of mechanical properties with infill type, density and material for 3D printing applications and may contribute to future development in lightweight and cost-effective additive manufacturing.

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“…Using AM also called 3D printing, is rising because of the process flexibility and ability to produce complex structures in less time. 1,2 One of the common methods in AM is Fused Deposition Modeling (FDM). FDM was introduced in the 1990s by Stratasys Inc. 3 FDM is a 3D printing process that continuous filament or thermoplastic material is fed by a moving and heated nozzle (print extruder head) and deposited on a growing part.…”

Section: Introductionmentioning

confidence: 99%

Effects of FDM 3D printing parameters on PLA biomaterial components dimensional accuracy and surface quality

Baraheni,

Shabgard,

Tabatabaee

2023

Proceedings of the Institution of Mechanical Engineers, Part C:

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Since precise manufacturing is very important in different industries, the produced part surface quality and dimensional accuracy have been brought to attention in recent years. In this regard, in Fused Deposition Modeling (FDM) as a prototyping method, controlling the process parameters in order to customize the produced part has been a value-added ability which should be considered. Optimizing the process parameters helps to enhance the mentioned products’ properties. In this paper, influential process parameters, including print speed (PS), infill percentage (IP), and nozzle temperature (NT) were selected to examine. That was concluded NT increase from 195°C to 240°C, IP increase from 10% to 50% and PS decrease from 150 to 50 mm/min enhance dimensional accuracy including inner and outer ovality up to 30%, 53%, and 50%, respectively. PS is the most significant parameter on inner and outer ovality by 43.92% and 66.60% contribution, respectively. The density of the FDM part was affected mostly by the IP by 92.94% contribution which leads to the printed part density increment up to 13%. Other parameters have small effect on the density value. According to desirability method, that was resulted NT of 240°C, IP of 50%, and PS of 54 mm/min are the optimum parameters. Besides, verification tests were carried out and a maximum error of 7.5% was reported, which shows optimization confidence. In the following, part geometry influence on the final part surface roughness and dimensional accuracy was examined. The experiments demonstrated that cube geometry has the least surface roughness of 20 µm and dimensional error of 0.17 mm due to the independent motion of the axes. Also cone geometry has the highest dimensional error of 0.32 mm and surface roughness of 51 µm which was due to simultaneous axes motion and lateral face lower than 90°.

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Evaluating the hole quality produced by vibratory drilling: additive manufactured PLA+

Cited by 14 publications

References 34 publications

Drilling Parameters and Post-Drilling Residual Tensile Properties of Natural-Fiber-Reinforced Composites: A Review

Drilling Parameters and Post-Drilling Residual Tensile Properties of Natural-Fiber-Reinforced Composites: A Review

Infill Density in Additive Manufacturing and Application to the DFMA of an Iron Man Helmet

Effects of FDM 3D printing parameters on PLA biomaterial components dimensional accuracy and surface quality

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