Modelling of additive manufacturing processes: a review and classification

Stavropoulos, Panagiotis; Foteinopoulos, Panagis

doi:10.1051/mfreview/2017014

Cited by 73 publications

(74 citation statements)

References 168 publications

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“…AM is the process of using 3D model data to join materials, typically layer upon layer [5], for the production of objects. It allows the manufacturing of complex geometries with near-zero material waste; moreover, AM is applicable to a variety of materials, thus offering increased design freedom [6,7]. The interest in AM has been steadily increasing in the last years [8]: it has been estimated that globally, the use of AM exclusively accounts for an added value of $667 million [9], a fact that is very encouraging concerning new ideas and adaptations of AM in other sectors.…”

Section: Introductionmentioning

confidence: 99%

“…Cement-based AM differs in three major aspects from AM applications in which other materials are used: the process mechanism, the materials, and the scale. The process mechanism is not thermal-based, as in the majority of AM applications [7]. The material properties and the difference of two orders of magnitude in scale (nozzle diameter, layer height) significantly affect the phenomena that take place.…”

Section: Introductionmentioning

confidence: 99%

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Cement-based additive manufacturing: experimental investigation of process quality

Foteinopoulos

Esnault

Komineas

et al. 2020

Int J Adv Manuf Technol

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The interest in additive manufacturing (AM) of cement-based materials is steadily increasing. Moreover, there is a growing need for higher productivity and part quality. In this study, the impact of the different values of the process parameters on part quality was identified. An alternative process-control strategy was investigated, according to which the width of the extruded path is controlled by the ratio of the extrusion speed over the scanner head speed. To conduct linear-and rotational-extrusion experiments, an experimental apparatus was designed. The significance of the effect of the speed ratio on the part quality was found to be the highest, followed by the extrusion radius, whereas the extrusion speed appeared to be of low importance. Therefore, in linear extrusion, high quality and consistency can be achieved by maintaining the ratio value above 0.8. However, in rotational extrusion, the effect of the radius was additionally considered by calculating the ratio on the outer side of the part, rather than on the centerline. Thus, acceptable quality and consistency were ensured for both linear and curved paths by controlling the aforementioned ratio values.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cement-based additive manufacturing: experimental investigation of process quality

Foteinopoulos

Esnault

Komineas

et al. 2020

Int J Adv Manuf Technol

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“…Additive manufacturing (AM) is an emerging manufacturing approach composed by 7 process groups [1], but the general manufacturing idea underlying all the groups is the same: fabricate objects layer by layer. The AM application fields are many, ranging from the aerospace one [2][3][4] to electronic fields [5][6][7][8][9], but at the state of art, Additive Manufacturing (AM) is still underexploited in the soft robotic field.…”

Section: Introductionmentioning

confidence: 99%

I-support soft arm for assistance tasks: a new manufacturing approach based on 3D printing and characterization

et al. 2020

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Soft robotics is an emerging scientific field well known for being widespread employed in several applications where dexterity and safe interaction are of major importance. In particular, a very challenging scenario in which it is involved concerns bio-medical field. In the last few years, several soft robotic devices have been developed to assist elderly people in daily tasks. In this paper, the authors present a new manufacturing approach for the fabrication of I-SUPPORT, a soft arm used to help needful people during shower activities. The proposed I-SUPPORT version, based on pneumatic and cable-driven actuation, is manufactured using Fused Filament Fabrication (FFF), the most common and inexpensive Additive Manufacturing (AM) technology. The advantages offered by FFF technology compared to traditional manufacturing methods regard: (i) the possibility to increase the automation degree of the process by reducing manual tasks, (ii) the decrease of assembly operations and (iii) an improvement in terms of supply chain. Moreover, the constitutive I-SUPPORT elements have been printed separately to save time, reduce materials and optimize the waste in case of failure. Afterwards, the proposed soft robotic arm has been tested to evaluate the performances and of the chambers, module and the whole I-SUPPORT manipulator.

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“…Due to their excellent mechanical properties, Al-Cu alloys are widely used in the aviation and aerospace fields [1][2][3]. The additive manufacturing technology (AM) has the advantages of fast response speed [4] and conservation of raw materials [5], opening a new window for the production of Al-Cu alloy structural parts. In recent years, a research hotspot has been the use of Al-Cu alloy as a raw material to make products using the wire + arc additive manufacturing (WAAM) process.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Heat Input on the Microstructure and Properties of Wire-Arc-Additive-Manufactured Al-Cu-Sn Alloy Deposits

Wang

et al. 2020

Metals

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In this experiment, Al-Cu-Sn alloy was used as raw material to form deposits with different heat input using the wire-arc additive manufacturing (WAAM) process. The effects of heat input on microstructure and mechanical properties of Al-Cu-Sn alloy deposits were investigated by metallography, scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and transmission electron microscopy (TEM) and mechanical properties tests. The results show that with increased of heat input, the thickness of the deposits increased and the layer height of the deposits increased. The number and size of pores in the deposits also improved with the increased heat input. The grain size of the deposits in the as-deposited state gradually increased and changed from isometric crystals to columnar crystals, the precipitated θ phases gradually converged on the grain boundary from within the grains. After T6 heat treatment, with increased heat input, the number of unsolved θ phases on the grain boundary increased, and the number of θ phases precipitated out of the matrix decreased as the phase spacing increased. With the increased heat input, the mechanical properties of the deposits gradually decreased, and the fracture mode changed from ductile fracture to brittle fracture.

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Modelling of additive manufacturing processes: a review and classification

Cited by 73 publications

References 168 publications

Cement-based additive manufacturing: experimental investigation of process quality

Cement-based additive manufacturing: experimental investigation of process quality

I-support soft arm for assistance tasks: a new manufacturing approach based on 3D printing and characterization

The Influence of Heat Input on the Microstructure and Properties of Wire-Arc-Additive-Manufactured Al-Cu-Sn Alloy Deposits

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