Surface bonding of additive manufactured parts from multi-colored PLA materials

Andó, Mátyás; Birosz, Márton Tamás; Jeganmohan, Sudhanraj

doi:10.1016/j.measurement.2020.108583

Cited by 33 publications

(16 citation statements)

References 12 publications

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“…The sample group of these specimens was marked with “O”. The assumed difference between the two layer designs is based on the effect of previously experienced contour lines [ 20 ]. Therefore, the shear distribution is affected not only by the layering but also by the contour lines within the layers.…”

Section: Methodsmentioning

confidence: 99%

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Layer Adhesion Test of Additively Manufactured Pins: A Shear Test

2021

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Additive Manufacturing (AM) became a popular engineering solution not only for Rapid Prototyping (RP) as a part of product development but as an effective solution for producing complex geometries as fully functional components. Even the modern engineering tools, such as the different simulation software, have a shape optimization solution especially for parts created by AM. To extend the application of these methods in this work, the failure properties of the 3D-printed parts have been investigated via shear test measurements. The layer adhesion can be calculated based on the results, which can be used later for further numerical modeling. In conclusion, it can be stated that the layer formation and the structure of the infill have a great influence on the mechanical properties. The layers formed following the conventional zig-zag infill style show a random failure, and the layers created via extruded concentric circles show more predictable load resistance.

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Section: Methodsmentioning

confidence: 99%

“…In this work, a shear test developed specifically for 3D-printed PLA parts is presented. This raw material is well examined in numerous published works [ 18 , 19 , 20 ], so most of the influencing factors of the printing can be considered.…”

Section: Introductionmentioning

confidence: 99%

Layer Adhesion Test of Additively Manufactured Pins: A Shear Test

2021

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“…A berendezésen található erőmérő cella mérési hibája 200-1 000 N mért érték között 1%, 1 000 N felett pedig 0,5%. A tönkremenetel oka, hogy az adhézió és az alapanyag szilárdsága hasonló nagyságrendű, ezért az alapanyag mechanikai tulajdonságai határozzák meg a tönkremenetel módját [8], összetett igénybevétel miatt. Ezek a mérési megoldások akkor tudják a nyírás jellegű tönkrementtel biztosítani, ha az adhézió kisebb mértékű az anyag szilárdságához képest (pl.…”

Section: Előkísérletekunclassified

3D nyomtatott rétegek közötti adhézió kísérleti vizsgálata

Magyarics¹,

Safranyik²,

Andó³

2021

eis

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A gyorsprototípus gyártással kialakított alkatrészek gyakorlati alkalmazása alapján azok réteges felépítés befolyásolja mechanikai tulajdonságaikat. Ahhoz, hogy a műszaki számítások során figyelembe tudjuk venni ezt a heterogén felépítést, elengedhetetlen a rétegekre-, és azok összekapcsolódására jellemző mechanikai tulajdonságok ismerete. A rétegek közt kialakuló adhézió kísérleti vizsgálatához különböző szabványos nyíró próbatesteken hajtottunk végre kísérleteket, végül egyedi készülék gyártása mellett döntöttünk. A fejlesztéshez végeselem analízist alkalmaztunk a számunkra ideális kialakítás érdekében. A készülék működőképességét a kontúrvonalszám teherbírásra gyakorolt hatását vizsgáló mintakísérlettel bizonyítottuk. Ez alapján megállapítottuk a rétegek közti adhézió nagyságát, illetve megvizsgáltuk, hogy adott kitöltési mód esetén hogyan kell figyelembe venni a próbatest keresztmetszetét.

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“…Within this context, Dangnan et al [13] also provided results about the progression of the CoF, together with the roughness profile, in the case of Polyjet materials (namely, 3D Acrylonitrile butadiene styrene (ABS) and Verogray). Since the roughness directly depends on the production technologies used [14,15], an indirect, unsophisticated connection can be made between the technologies and the CoF. For example, if pure PLA has an average roughness height (R a ) of 10 µm and exhibits an average CoF of 0.2 (±0.1) [16], then this is equivalent to the achievable roughness of production processes such as snagging, sawing, forging, and, less frequently, extruding [17].…”

Section: Introductionmentioning

confidence: 99%

Numerical Wear Analysis of a PLA-Made Spur Gear Pair as a Function of Friction Coefficient and Temperature

Fekete

2021

Coatings

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Polylactic acid (PLA)-made machine elements exhibit easy machining, biodegradability, and excellent mechanical properties. However, enhancing their wear resistance is still a crucial engineering point, which may be achieved by altering (lowering) their coefficient of friction (CoF). Therefore, the first aim of this paper is to analyze how wear is affected by the alteration of CoF. The second aim is connected to the fact that PLA is sensitive to heat, which also limits its applicability. Accordingly, the next goal is to explore the effect of temperature on wear propagation. This study answers these questions by means of multibody dynamics simulations of a PLA-made spur gear pair. Simulations were carried out under constant torque, while the CoF and the temperature were varied in a normal operation domain (CoF: 0.1–0.05, T = 20–30 °C). The results showed that the wear volume gradually began to decline at approximately 0.085 CoF, whilst convergence to steady-state wear could be observed at 0.05 CoF. In conclusion, alteration of the CoF can lower wear by 35%, in this specific domain, while even a 5 °C rise in temperature causes 40% wear progression. The feasibility of the numerical procedure was validated by comparing numerically and experimentally obtained wear–torque results.

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Surface bonding of additive manufactured parts from multi-colored PLA materials

Cited by 33 publications

References 12 publications

Layer Adhesion Test of Additively Manufactured Pins: A Shear Test

Layer Adhesion Test of Additively Manufactured Pins: A Shear Test

3D nyomtatott rétegek közötti adhézió kísérleti vizsgálata

Numerical Wear Analysis of a PLA-Made Spur Gear Pair as a Function of Friction Coefficient and Temperature

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