Relating print velocity and extrusion characteristics of 3D-printable cementitious binders: Implications towards testing methods

Nair, Sooraj A.O.; Panda, Subhashree; Tripathi, Avinaya; Neithalath, Narayanan

doi:10.1016/j.addma.2021.102127

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…To regulate the rheological properties of polymer composites during DIW 3D printing, researchers have developed a series of rheological control strategies. 71 Yuk et al 72 regulated the extrusion state of poly(3,-4-ethylenedioxythiophene)/PPS composites by adjusting the materials' ratios and their flow-field stretching effect during extrusion to realize the transition from salivating to laminar flow and solid state, and to improve their printability. Sun et al 73 developed an in situ dual heating (ISDH) strategy that combines DIW 3D printing technology and a heating-accelerated in situ gelation mechanism, which enables rapid in situ gelation of newly extruded thermosetting inks through a Joule heater integrated with the print nozzle to achieve rapid curing.…”

Section: Direct Ink Writingmentioning

confidence: 99%

“…To regulate the rheological properties of polymer composites during DIW 3D printing, researchers have developed a series of rheological control strategies 71 . Yuk et al 72 regulated the extrusion state of poly(3,4‐ethylenedioxythiophene)/PPS composites by adjusting the materials' ratios and their flow‐field stretching effect during extrusion to realize the transition from salivating to laminar flow and solid state, and to improve their printability.…”

Section: Improvements In 3d Printing Technology For Polymer Compositesmentioning

confidence: 99%

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Advances in 3D printing for polymer composites: A review

Ma,

Zhang,

Ruan

et al. 2024

InfoMat

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The potential of three‐dimensional (3D) printing technology in the fabrication of advanced polymer composites is becoming increasingly evident. This review discusses the latest research developments and applications of 3D printing in polymer composites. First, it focuses on the optimization of 3D printing technology, that is, by upgrading the equipment or components or adjusting the printing parameters, to make them more adaptable to the processing characteristics of polymer composites and to improve the comprehensive performance of the products. Second, it focuses on the 3D printable novel consumables for polymer composites, which mainly include the new printing filaments, printing inks, photosensitive resins, and printing powders, introducing the unique properties of the new consumables and different ways to apply them to 3D printing. Finally, the applications of 3D printing technology in the preparation of functional polymer composites (such as thermal conductivity, electromagnetic interference shielding, biomedicine, self‐healing, and environmental responsiveness) are explored, with a focus on the distribution of the functional fillers and the influence of the topological shapes on the properties and functional characteristics of the 3D printed products. The aim of this review is to deepen the understanding of the convergence between 3D printing technology and polymer composites and to anticipate future trends and applications.image

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Section: Direct Ink Writingmentioning

confidence: 99%

Section: Improvements In 3d Printing Technology For Polymer Compositesmentioning

confidence: 99%

Advances in 3D printing for polymer composites: A review

Ma,

Zhang,

Ruan

et al. 2024

InfoMat

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“…The studies [ 17 , 18 , 19 , 20 ] allow the authors to generalize the extrusion behavior of FCP using such a ram extruder system. To enable a successful extrusion, the extrusion driving force, F e (in this case, ram extrusion force, Fram), has to overcome extrusion resistive forces that are responsible for the extrusion pressure drop [ 21 , 22 , 23 ], which may include: (1) the chamber wall shear force F cf (or friction force) in the billet zone; (2) the shaping force F pl in the shaping zone, also known as the die entry pressure, which is responsible for the plastic deformation of FCP between the chamber and outlet; (3) the nozzle wall shear force F nf (or friction force) in the shaping zone, also known as die land pressure; (4) the dead zone shear force F df (or friction force) in the dead zone; and (5) the layer pressing force, F lp needs to be taken into account when the layer pressing extrusion mode is adopted.…”

Section: Extrusion Process and Extruder Systemmentioning

confidence: 99%

“…The screw extrusion mechanism relies on the use of a screw to impose a screw extrusion force, F screw to continuously convey the FCP towards the outlet [ 31 ]. It not only enhances the controllability of the extrusion process (e.g., screw speed control) but also provides some extent of FCP homogenization within the extruder and inhibits the formation of the dead zone [ 21 , 32 ]. Moreover, in this system, the repartition of the extrusion effort along the screw length reduces the risk of consolidation.…”

Section: Extrusion Process and Extruder Systemmentioning

confidence: 99%

A Review of the Extruder System Design for Large-Scale Extrusion-Based 3D Concrete Printing

et al. 2023

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Extrusion-based 3D concrete printing (E3DCP) has been appreciated by academia and industry as the most plausible candidate for prospective concrete constructions. Considerable research efforts are dedicated to the material design to improve the extrudability of fresh concrete. However, at the time of writing this paper, there is still a lack of a review paper that highlights the significance of the mechanical design of the E3DCP system. This paper provides a comprehensive review of the mechanical design of the E3DCP extruder system in terms of the extruder system, positioning system and advanced fittings, and their effects on the extrudability are also discussed by relating to the extrusion driving forces and extrusion resistive forces which may include chamber wall shear force, shaping force, nozzle wall shear force, dead zone shear force and layer pressing force. Moreover, a classification framework of the E3DCP system as an extension of the DFC classification framework was proposed. The authors reckoned that such a classification framework could assist a more systematic E3DCP system design.

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