Design and evaluation of additively manufactured parts with three dimensional continuous fibre reinforcement

Brooks, Hadley Laurence; Molony, Samuel

doi:10.1016/j.matdes.2015.10.123

Cited by 67 publications

(29 citation statements)

References 11 publications

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“…Assuming the reinforcement is much stiffer than the polymer part material (Er >> Em) it will take a proportionately higher percentage of the load, as demonstrated by applying the rule of mixtures to the Voigt model for axial loading [8]. The reinforcement design guidelines were developed in parallel with experimental testing and can be found in previous works Molony, 2016, Brooks andMolony, 2015). Figure 2 shows the outcome of applying the design methodology to a pulley housing.…”

Section: Reinforced Fff Partsmentioning

confidence: 99%

“…Figure 3 shows the load-displacement curves for PLA pulley housings from a previous study (Brooks and Molony, 2016) with and without carbon fibre reinforcement with a strain rate of 2.5 mm/min. The reinforcement resulted in a 4,689% increase in tensile strength and a 2,212% increase in elongation to failure over the unreinforced part.…”

Section: Reinforced Fff Partsmentioning

confidence: 99%

“…Recent research has shown that designing reinforcement channels into AM parts, and adding continuous reinforcement in a post-build process, dramatic increases in mechanical properties are achievable regardless of the build orientation of the part Molony, 2016, Brooks andMolony, 2015). This method, briefly explained in the next section, also has the advantage of working with all AM technologies.…”

Section: Introductionmentioning

confidence: 99%

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Tensile and fatigue failure of 3D printed parts with continuous fibre reinforcement

2017

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This paper introduces a design methodology used to integrate continuous fibre reinforcement into AM polymer parts with the aim of improving their mechanical properties. Tensile and low cycle fatigue testing of reinforced parts is carried out for a range of load conditions and strain rates Physical testing showed that it was possible to improve the strength of parts by 400% and cycles to failure by 42,800% with the addition of 4% carbon by weight. Logarithmic load/cycle relationships were found also samples showed significant variability in the number of cycles to failure. No correlation between the density of the polylactic acid (PLA) infill and the tensile strength or low cycle fatigue life.Access holes used to thread the fibre into the reinforcement channels were identified as stress concentrators initiating cracks in the PLA and separation of the reinforcement from the PLA part.

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Section: Reinforced Fff Partsmentioning

confidence: 99%

Section: Reinforced Fff Partsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Tensile and fatigue failure of 3D printed parts with continuous fibre reinforcement

2017

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“…Letcher and Waytashek (2014) and Jerez-Mesa, Travieso-Rodriguez, Llumà-Fuentes, Gomez-Gras, and Puig (2017) carried out tensile tests for investigating fatigue resistance of samples printed of polylactic acid (PLA) polymer. Brooks and Molony (2016) investigated manufacturing aspects of reinforced samples made of PLA and acrylonitrile butadiene styrene (ABS) polymers. Aramid, carbon, and basalt filaments were used as the reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Structural Application of 3d Printing Technologies: Mechanical Properties of Printed Polymeric Materials / Konstrukcinis 3d Spausdinimo Technologijų Taikymas: Spausdintų Polimerinių Medžiagų Mechaninės Savybės

Shkundalova

Rimkus

Gribniak

2018

Science - Future of Lithuania

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Additive manufacturing and modern printing technologies using polymeric materials extend the limits of industrial production and encourage applying 3D printing technique in many fields. An item of any shape and size limited only by the printing pad of particular equipment can be reproduced from a variety of materials. Polymers is the object of this research. It is known that mechanical properties of the printed elements are closely related with the manufacturing technology and vary significantly depending on the chosen production parameters such as printing temperature, velocity, and infill density. Depending on the purpose, a particular type of polymer can be used in structural analysis. This work considers mechanical properties of four thermoplastic polymeric materials widely used for prototyping: polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), high impact polystyrene (HIPS), and polyethylene terephthalate (PETG). The study is focused on two fundamental mechanical characteristics, tensile strength and modulus of elasticity, of the printed material. Dumbbell-shaped samples were made of the PLA, ABS, HIPS and PETG polymers using 3D printing technique with the same filling density (≈ 20%) of the entry level. The tensile tests were carried out in Laboratory of Innovative Building Structures at Vilnius Gediminas Technical University. The predominant effect of the printing direction on the mechanical properties of the printed materials was demonstrated in this study. The corresponding experimental characteristics are presented in the manuscript. Santrauka Modernūs gamybos procesai ir spausdinimo technologijos, naudojant polimerines medžiagas, plečia pramoninės gamybos ribas bei skatina taikyti 3D spausdinimo technologijas daugelyje sričių. Tokios technologijos leidžia gaminti bet kokios formos elementus iš įvairių medžiagų, o jų dydį lemia tik naudojamos spausdinimo įrangos galimybės. Pagrindinis šio tyrimo objektas – polimerinės medžiagos. Spausdintų elementų iš polimerinių medžiagų mechaninės savybės glaudžiai siejamos su gamybos technologija ir gali stipriai varijuoti keičiant gamybos proceso parametrus – spausdinimo temperatūrą, greitį, užpildo tankį. Polimero tipas kartu su jo mechaninėmis savybėmis parenkamas atsižvelgiant į konstrukcinį uždavinį. Šiame darbe nagrinėjamos plačiai prototipų gamyboje taikomų termoplastinių polimerinių medžiagų – polietileno rūgšties (PLA), akrilonitrilo butadieno stireno (ABS), polistireno (HIPS) ir polietileno tereftalato (PETG) – mechaninės savybės. Tyrime dėmesys skiriamas dviem pagrindinėms mechaninėms medžiagų charakteristikoms – tempiamajam stipriui ir tamprumo moduliui. Taikant 3D spausdinimo technologiją buvo pagaminti kaulo formos bandiniai iš PLA, ABS, HIPS ir PETG medžiagų. Bandinių užpildo tankis siekė ≈ 20 % paviršiaus spausdinimo sluoksnio tankio. Elementų tempimo bandymai atlikti Inovatyvių statybinių konstrukcijų laboratorijoje Vilniaus Gedimino technikos universitete. Šiame tyrime buvo parodyta spausdinimo krypties įtaka spausdintų medžiagų mechaninėms savybėms. Taip pat pateiktos eksperimentiškai nustatytos polimerinių medžiagų mechaninės savybės.

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“…The use of particles or short fibres (discontinuous reinforcement) results that matrix always takes part in the load carrying. In this case, the main factor determining the properties of the composite material is formed during the process of the structure connection between its components [9,[11][12][13][14][15][16][17][18][19][20]. Fig.1.…”

Section: Introductionmentioning

confidence: 99%

Abrasive Wear of AlSi12-Al2O3 Composite Materials Manufactured by Pressure Infiltration

Kremzer¹,

Dziekońska²,

Sroka³

et al. 2016

Archives of Metallurgy and Materials

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The aim of this study is to investigate tribological properties of EN AC-AlSi12 alloy composite materials matrix manufactured by pressure infiltration of Al2O3 porous preforms. In the paper, a technique of manufacturing composite materials was described in detail as well as wear resistance made on pin on disc was tested. Metallographic observations of wear traces of tested materials using stereoscopic and confocal microscopy were made. Studies allow concluding that obtained composite materials have much better wear resistance than the matrix alloy AlSi12. It was further proved that the developed technology of their preparation consisting of pressure infiltration of porous ceramic preforms can find a practical application.

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Design and evaluation of additively manufactured parts with three dimensional continuous fibre reinforcement

Cited by 67 publications

References 11 publications

Tensile and fatigue failure of 3D printed parts with continuous fibre reinforcement

Tensile and fatigue failure of 3D printed parts with continuous fibre reinforcement

Structural Application of 3d Printing Technologies: Mechanical Properties of Printed Polymeric Materials / Konstrukcinis 3d Spausdinimo Technologijų Taikymas: Spausdintų Polimerinių Medžiagų Mechaninės Savybės

Abrasive Wear of AlSi12-Al2O3 Composite Materials Manufactured by Pressure Infiltration

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