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Journal articles on the topic '3D extruded geometries'

Author: Grafiati

Published: 25 January 2025

Last updated: 31 July 2025

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1

Teixeira, João, Cecília Ogliari Schaefer, Lino Maia, Bárbara Rangel, Rui Neto, and Jorge Lino Alves. "Influence of Supplementary Cementitious Materials on Fresh Properties of 3D Printable Materials." Sustainability 14, no. 7 (2022): 3970. http://dx.doi.org/10.3390/su14073970.

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The development of printers and materials for 3D Printing Construction during the last two decades has allowed the construction of increasingly complex projects. Some of them have broken construction speed records due to the simplification of the construction process, particularly in non-standard geometries. However, for performance and security reasons the materials used had considerable amounts of Portland cement (PC), a constituent that increases the cost and environmental impact of 3D Printable Materials (3DPM). Supplementary Cement Materials (SCM), such as fly ash, silica fume and metakao

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2

Sciannandrone, Daniele, Simone Santandrea, and Richard Sanchez. "Optimized tracking strategies for step MOC calculations in extruded 3D axial geometries." Annals of Nuclear Energy 87 (January 2016): 49–60. http://dx.doi.org/10.1016/j.anucene.2015.05.014.

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3

Buj-Corral, Irene, José Antonio Padilla, Joaquim Minguella-Canela, Lourdes Rodero, Lluís Marco, and Elena Xuriguera. "Design of Pastes for Direct Ink Writing of Zirconia Parts with Medical Applications." Key Engineering Materials 958 (October 5, 2023): 157–63. http://dx.doi.org/10.4028/p-izk9dd.

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Direct ink writing (DIW) is an extrusion additive manufacturing (AM) technique in which inks are extruded through a nozzle and then deposited layer-by-layer. This technology allows 3D printing many different materials such as ceramics, metals, food, etc. In this work, the performance of zirconia pastes is addressed. The pastes are composed of yttria stabilized zirconia (YSZ) powder and a polymeric binder. Ceramic content is a mix of two components: A and B. Both the total content of ceramic and the content of component A in the paste are varied, according to a 32 design of experiments. The pas

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4

Rufo-Martín, Celia, José Díaz-Álvarez, and Diego Infante-García. "Influence of PMMA 3D Printing Geometries on the Mechanical Response." Key Engineering Materials 958 (October 5, 2023): 31–39. http://dx.doi.org/10.4028/p-9tor3c.

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This work presents a study regarding the mechanical characterization of polymethyl methacrylate (PMMA) patterned samples manufactured via material-extruded additive manufacturing. In recent years, literature about mechanical analysis in additive manufacturing has been growing increasingly, especially for material extrusion-based techniques. However, this trend surpasses the speed of information released by standard councils, existing no clear specifications for polymer characterization apart from conventional techniques. This issue has led to premature breakage as well as fracture not located

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5

Graziano, Laurent, Simone Santandrea, and Daniele Sciannandrone. "Polynomial axial expansion in the Method of Characteristics for neutron transport in 3D extruded geometries." EPJ Web of Conferences 153 (2017): 06027. http://dx.doi.org/10.1051/epjconf/201715306027.

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Mitchell, Kellen, Lily Raymond, and Yifei Jin. "Material Extrusion Advanced Manufacturing of Helical Artificial Muscles from Shape Memory Polymer." Machines 10, no. 7 (2022): 497. http://dx.doi.org/10.3390/machines10070497.

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Rehabilitation and mobility assistance using robotic orthosis or exoskeletons have shown potential in aiding those with musculoskeletal disorders. Artificial muscles are the main component used to drive robotics and bio-assistive devices. However, current fabrication methods to produce artificial muscles are technically challenging and laborious for medical staff at clinics and hospitals. This study aims to investigate a printhead system for material extrusion of helical polymer artificial muscles. In the proposed system, an internal fluted mandrel within the printhead and a temperature contro

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7

Kothavade, Premkumar, Abdullah Kafi, Chaitali Dekiwadia, et al. "Extrusion 3D Printing of Intrinsically Fluorescent Thermoplastic Polyimide: Revealing an Undisclosed Potential." Polymers 16, no. 19 (2024): 2798. http://dx.doi.org/10.3390/polym16192798.

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Thermoplastic polyimides (TPIs) are promising lightweight materials for replacing metal components in aerospace, rocketry, and automotive industries. Key TPI attributes include low density, thermal stability, mechanical strength, inherent flame retardancy, and intrinsic fluorescence under UV light. The application of advanced manufacturing techniques, especially 3D printing, could significantly broaden the use of TPIs; however, challenges in melt-processing this class of polymer represent a barrier. This study explored the processability, 3D-printing and hence mechanical, and fluorescence prop

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Nikfarjam, F., Y. Cheny, and O. Botella. "The LS-STAG immersed boundary/cut-cell method for non-Newtonian flows in 3D extruded geometries." Computer Physics Communications 226 (May 2018): 67–80. http://dx.doi.org/10.1016/j.cpc.2018.01.006.

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9

Ferro, Paolo, Alberto Fabrizi, Hamada Elsayed, and Gianpaolo Savio. "Multi-Material Additive Manufacturing: Creating IN718-AISI 316L Bimetallic Parts by 3D Printing, Debinding, and Sintering." Sustainability 15, no. 15 (2023): 11911. http://dx.doi.org/10.3390/su151511911.

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Allowing for complex shape and low energy consumption, 3D printing, debinding, and sintering (PDS) is a promising and cost-effective additive manufacturing (AM) technology. Moreover, PDS is particularly suitable for producing bimetallic parts using two metal/polymer composite filaments in the same nozzle, known as co-extrusion, or in different nozzles, in a setup called bi-extrusion. The paper describes a first attempt to produce bimetallic parts using Inconel 718 and AISI 316L stainless steel via PDS. The primary goal is to assess the metallurgical characteristics, part shrinkage, relative de

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Cai, Yuanzhi, and Lei Fan. "An Efficient Approach to Automatic Construction of 3D Watertight Geometry of Buildings Using Point Clouds." Remote Sensing 13, no. 10 (2021): 1947. http://dx.doi.org/10.3390/rs13101947.

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Recent years have witnessed an increasing use of 3D models in general and 3D geometric models specifically of built environment for various applications, owing to the advancement of mapping techniques for accurate 3D information. Depending on the application scenarios, there exist various types of approaches to automate the construction of 3D building geometry. However, in those studies, less attention has been paid to watertight geometries derived from point cloud data, which are of use to the management and the simulations of building energy. To this end, an efficient reconstruction approach

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Charbonneau, André M., Joseph M. Kinsella, and Simon D. Tran. "3D Cultures of Salivary Gland Cells in Native or Gelled Egg Yolk Plasma, Combined with Egg White and 3D-Printing of Gelled Egg Yolk Plasma." Materials 12, no. 21 (2019): 3480. http://dx.doi.org/10.3390/ma12213480.

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For salivary gland (SG) tissue engineering, we cultured acinar NS-SV-AC cell line or primary SG fibroblasts for 14 days in avian egg yolk plasma (EYP). Media or egg white (EW) supplemented the cultures as they grew in 3D-Cryo histology well inserts. In the second half of this manuscript, we measured EYP’s freeze-thaw gelation and freeze-thaw induced gelled EYP (GEYP), and designed and tested further GEYP tissue engineering applications. With a 3D-Cryo well insert, we tested GEYP as a structural support for 3D cell culture or as a bio-ink for 3D-Bioprinting fluorescent cells. In non-printed EYP

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12

Santandrea, S., D. Sciannandrone, R. Sanchez, L. Mao, and L. Graziano. "A Neutron Transport Characteristics Method for 3D Axially Extruded Geometries Coupled with a Fine Group Self-Shielding Environment." Nuclear Science and Engineering 186, no. 3 (2017): 239–76. http://dx.doi.org/10.1080/00295639.2016.1273634.

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13

Son, Kyu-Hyon, Jung-Hun Kim, Dong-Eun Kim, et al. "Analysis of Correlation Between Contrast and Component of Polylatic Acid Composite for Fused Deposition Modeling 3D Printing." Journal of Nanoscience and Nanotechnology 20, no. 8 (2020): 5107–11. http://dx.doi.org/10.1166/jnn.2020.17835.

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Additive manufacturing or three-dimensional (3D) printing is considered a disruptive technology for producing components with topologically optimized complex geometries as well as functionalities that are not achievable by traditional methods. 3D printing is expected to revolutionize the manufacturing of components. While several 3D printing systems are available, printing based on fused-deposition modeling (FDM) using thermoplastics is particularly widespread because of the simplicity and potential applicability of the method. In this study, we report the analysis of correlation between contr

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Mendibil, Xabier, Gaizka Tena, Alaine Duque, Nerea Uranga, Miguel Ángel Campanero, and Jesús Alonso. "Direct Powder Extrusion of Paracetamol Loaded Mixtures for 3D Printed Pharmaceutics for Personalized Medicine via Low Temperature Thermal Processing." Pharmaceutics 13, no. 6 (2021): 907. http://dx.doi.org/10.3390/pharmaceutics13060907.

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Three-dimensional printed drug development is nowadays an active area in the pharmaceutical industry, where the search for an appropriate edible carrier that permits the thermal processing of the mixture at temperature levels that are safe for the drug is an important field of study. Here, potato starch and hydroxypropyl cellulose based mixtures loaded with paracetamol up to 50% in weight were processed by hot melt extrusion at 85 °C to test their suitability to be thermally processed. The extruded mixtures were tested by liquid chromatography to analyze their release curves and were thermally

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15

Pariona, Moises Meza. "Simulation by coupling of the level set and thermal methods to extruded material flow in 3D printed polymers." CONTRIBUCIONES A LAS CIENCIAS SOCIALES 16, no. 12 (2023): 32219–35. http://dx.doi.org/10.55905/revconv.16n.12-188.

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Fused deposition modelling (FDM) in polymers provides new opportunities for the manufacturing of components with customizable geometries and mechanical properties, with high speed and low cost. To this end, we propose a computational framework for the simulation of the printing process of the flow during low density polyethylene (LDPE) material extrusion, coupled to thermal, level set method and CFD phenomena. This work presents an FEM (finite element method) mathematical model that describes as result of the melt parameters of the polymer flow, such as, the volume fraction, temperature field,

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Birosz, Márton Tamás, Mátyás Andó, and Ferenc Safranyik. "Layer Adhesion Test of Additively Manufactured Pins: A Shear Test." Polymers 14, no. 1 (2021): 55. http://dx.doi.org/10.3390/polym14010055.

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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 c

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17

Li, Mingyang, Zhixin Liu, Jin Yao Ho, and Teck Neng Wong. "Improving Homogeneity of 3D-Printed Cementitious Material Distribution for Radial Toolpath." Fluids 8, no. 3 (2023): 87. http://dx.doi.org/10.3390/fluids8030087.

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The 3D cementitious material printing method is an extrusion-based additive manufacturing strategy in which cementitious materials are extruded through a dynamic nozzle system to form filaments. Despite its ability to fabricate structures with high complexity and efficiency, the uneven material distribution during the extrusion and deposition process is often encountered when a radial toolpath is introduced. This limits the design freedom and printing parameters that can be utilized during radial toolpath printing. Here, we report a facile strategy to overcome the existing challenges of cement

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18

Castanon-Jano, Laura, Mario Lozano-Corona, and Elena Blanco-Fernandez. "Effect of Accelerated Degradation on the Dimensions and Mechanical Performance of 3D-Printed PLA Parts Using Different Filament Manufacturing Techniques." Materials 18, no. 10 (2025): 2267. https://doi.org/10.3390/ma18102267.

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Polymer 3D printing is popular due to its accessibility and low material waste. While commonly used in prototyping and medical applications, its potential for molds in complex concrete geometries, such as heritage reproductions or artificial reefs, remains underexplored. These applications require resistance to degradation from UV exposure, rain, and highly alkaline concrete (pH~13). This study evaluates the accelerated degradation of 3D-printed PLA specimens. Four PLA types were tested: virgin PLA extruded in the lab, commercial PLA, PLA with 50% metal powder, and PLA with encapsulated metal

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19

Hu, Fuwen, and Tian Li. "An Origami Flexiball-Inspired Metamaterial Actuator and Its In-Pipe Robot Prototype." Actuators 10, no. 4 (2021): 67. http://dx.doi.org/10.3390/act10040067.

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Usually, polyhedra are viewed as the underlying constructive cells of packing or tiling in many disciplines, including crystallography, protein folding, viruses structure, building architecture, etc. Here, inspired by the flexible origami polyhedra (commonly called origami flexiballs), we initially probe into their intrinsic metamaterial properties and robotized methods from fabrication to actuation. Firstly, the topology, geometries and elastic energies of shape shifting are analyzed for the three kinds of origami flexiballs with extruded outward rhombic faces. Provably, they meet the definit

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20

Shojaie, Fatemeh, Carmen Ferrero, and Isidoro Caraballo. "Development of 3D-Printed Bicompartmental Devices by Dual-Nozzle Fused Deposition Modeling (FDM) for Colon-Specific Drug Delivery." Pharmaceutics 15, no. 9 (2023): 2362. http://dx.doi.org/10.3390/pharmaceutics15092362.

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Dual-nozzle fused deposition modeling (FDM) is a 3D printing technique that allows for the simultaneous printing of two polymeric filaments and the design of complex geometries. Hence, hybrid formulations and structurally different sections can be combined into the same dosage form to achieve customized drug release kinetics. The objective of this study was to develop a novel bicompartmental device by dual-nozzle FDM for colon-specific drug delivery. Hydroxypropylmethylcellulose acetate succinate (HPMCAS) and polyvinyl alcohol (PVA) were selected as matrix-forming polymers of the outer pH-depe

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21

Papon, Easir Arafat, Anwarul Haque, and Muhammad Ali Rob Sharif. "Numerical study for the improvement of bead spreading architecture with modified nozzle geometries in additive manufacturing of polymers." Rapid Prototyping Journal 27, no. 3 (2021): 518–29. http://dx.doi.org/10.1108/rpj-05-2019-0142.

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Purpose This paper aims to develop a numerical model of bead spreading architecture of a viscous polymer in fused filament fabrication (FFF) process with different nozzle geometry. This paper also focuses on the manufacturing feasibility of the nozzles and 3D printing of the molten beads using the developed nozzles. Design/methodology/approach The flow of a highly viscous polymer from a nozzle, the melt expansion in free space and the deposition of the melt on a moving platform are captured using the FLUENT volume of fluid (VOF) method based computational fluid dynamics code. The free surface

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22

Drossel, Welf-Guntram, Jörn Ihlemann, Ralf Landgraf, Erik Oelsch, and Marek Schmidt. "Basic Research for Additive Manufacturing of Rubber." Polymers 12, no. 10 (2020): 2266. http://dx.doi.org/10.3390/polym12102266.

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The dissemination and use of additive processes are growing rapidly. Nevertheless, for the material class of elastomers made of vulcanizable rubber, there is still no technical solution for producing them using 3D printing. Therefore, this paper deals with the basic investigations to develop an approach for rubber printing. For this purpose, a fused deposition modeling (FDM) 3D printer is modified with a screw extruder. Tests are carried out to identify the optimal printing parameters. Afterwards, test prints are performed for the deposition of rubber strands on top of each other and for the f

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23

Goh, Wei, and Michinao Hashimoto. "Dual Sacrificial Molding: Fabricating 3D Microchannels with Overhang and Helical Features." Micromachines 9, no. 10 (2018): 523. http://dx.doi.org/10.3390/mi9100523.

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Fused deposition modeling (FDM) has become an indispensable tool for 3D printing of molds used for sacrificial molding to fabricate microfluidic devices. The freedom of design of a mold is, however, restricted to the capabilities of the 3D printer and associated materials. Although FDM has been used to create a sacrificial mold made with polyvinyl alcohol (PVA) to produce 3D microchannels, microchannels with free-hanging geometries are still difficult to achieve. Herein, dual sacrificial molding was devised to fabricate microchannels with overhang or helical features in PDMS using two compleme

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24

Shuaibu, A., and A. Ahmad. "Effects of heat treatment on tensile properties of 3D-printed short fiber-reinforced composites." Nigerian Journal of Technology 43, no. 1 (2024): 56–63. http://dx.doi.org/10.4314/njt.v43i1.8.

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3D-printed carbon fibre-reinforced composites (CFRC) using fused deposition modelling (FDM) offer the potential for building complex geometries and low waste. However, these composites have weaker interlaminar bonding and higher void content than traditional composites. This paper explores the effect of temperature on improving the mechanical properties of 3D-printed short carbon fibre- reinforced polyamide (PACF). Two types of printed structures were tested: one with a 0° build orientation (parallel to extruder movement) and the other with a 90° build orientation (perpendicular to extruder mo

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Mr. Mayur Chavda, Patel Kavan, Yashraj Rathod, et al. "Development and Evaluation of a Cost-Effective Desktop 3D Printing System for Rapid Prototyping." International Journal of Latest Technology in Engineering Management & Applied Science 14, no. 6 (2025): 500–508. https://doi.org/10.51583/ijltemas.2025.140600054.

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Abstract—The rapid advancement of additive manufacturing has transformed prototyping and small-scale production by enabling the creation of complex geometries and customizable products through layer-by-layer fabrication. This paper presents the design, development, and evaluation of a cost-effective desktop 3D printer optimized for rapid additive manufacturing using Fused Deposition Modeling (FDM) technology. The printer combines a rigid aluminum extrusion frame, NEMA 17 stepper motors, a Bowden extruder with an all-metal hotend, and open- source electronics controlled by a 32-bit microcontrol

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26

Brunčko, M., A. C. Kneissl, L. Gorše, and I. Anžel. "Characterization of microstructure and magnetic properties of 3D printed bonded magnets made by fused deposition modeling." Practical Metallography 61, no. 3 (2024): 170–81. http://dx.doi.org/10.1515/pm-2024-0013.

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Abstract Bonded magnets are composite materials consisting of polymer matrix and magnetic powders, prepared by rapid solidification processes from Nd-Fe-B alloys. They are synthesised by the compounding process on a twin-screw extruder, whereby, the finished products of complex shapes can be made from bonded magnets using injection moulding or 3D printing by fused deposition modelling method (FDM). The main advantages of 3D printing are the possibility to produce parts with complex geometries that are not possible with traditional manufacturing techniques and low-cost production of small batch

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27

Reich, Matthew J., Aubrey L. Woern, Nagendra G. Tanikella, and Joshua M. Pearce. "Mechanical Properties and Applications of Recycled Polycarbonate Particle Material Extrusion-Based Additive Manufacturing." Materials 12, no. 10 (2019): 1642. http://dx.doi.org/10.3390/ma12101642.

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Past work has shown that particle material extrusion (fused particle fabrication (FPF)/fused granular fabrication (FGF)) has the potential for increasing the use of recycled polymers in 3D printing. This study extends this potential to high-performance (high-mechanical-strength and heat-resistant) polymers using polycarbonate (PC). Recycled PC regrind of approximately 25 mm2 was 3D printed with an open-source Gigabot X and analyzed. A temperature and nozzle velocity matrix was used to find useful printing parameters, and a print test was used to maximize the output for a two-temperature stage

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Golman, Boris, Piotr Skrzypacz, and Wittaya Julklang. "Modeling and Numerical Study of Ceramic Paste Extrusion." MATEC Web of Conferences 333 (2021): 02011. http://dx.doi.org/10.1051/matecconf/202133302011.

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The extrusion processes of ceramic pastes, including 3D printing, are used for the production of high-value products. Ceramic paste extrusion is a complex process which depends on the paste rheological properties, die and extruder geometries, and operational parameters. Modeling and quantitative analysis of paste molding are important to design proper extrusion process for the production of high-value extrudates of desired strength, shape, and morphology. In this paper, the mathematical model of ram extrusion of ceramic materials is established, and the paste continuity and momentum equations

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Golman, Boris, Piotr Skrzypacz, and Wittaya Julklang. "Modeling and Numerical Study of Ceramic Paste Extrusion." MATEC Web of Conferences 333 (2021): 02011. http://dx.doi.org/10.1051/matecconf/202133302011.

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The extrusion processes of ceramic pastes, including 3D printing, are used for the production of high-value products. Ceramic paste extrusion is a complex process which depends on the paste rheological properties, die and extruder geometries, and operational parameters. Modeling and quantitative analysis of paste molding are important to design proper extrusion process for the production of high-value extrudates of desired strength, shape, and morphology. In this paper, the mathematical model of ram extrusion of ceramic materials is established, and the paste continuity and momentum equations

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30

Mazzei Capote, Gerardo Andres, Maria Camila Montoya-Ospina, Zijie Liu, et al. "Compounding a High-Permittivity Thermoplastic Material and Its Applicability in Manufacturing of Microwave Photonic Crystals." Materials 15, no. 7 (2022): 2492. http://dx.doi.org/10.3390/ma15072492.

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Additive Manufacturing (AM) techniques allow the production of complex geometries unattainable through other traditional technologies. This advantage lends itself well to rapidly iterating and improving upon the design of microwave photonic crystals, which are structures with intricate, repeating features. The issue tackled by this work involves compounding a high-permittivity material that can be used to produce 3D microwave photonic structures using polymer extrusion-based AM techniques. This material was acrylonitrile butadiene styrene (ABS)-based and used barium titanate (BaTiO3) ceramic a

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31

Khan, Zainab N., Hamed I. Albalawi, Alexander U. Valle-Pérez, et al. "From 3D printed molds to bioprinted scaffolds: A hybrid material extrusion and vat polymerization bioprinting approach for soft matter constructs." Materials Science in Additive Manufacturing 1, no. 1 (2022): 7. http://dx.doi.org/10.18063/msam.v1i1.7.

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Three-dimensional (3D) bioprinting methods vary in difficulty and complexity depending on the application desired and biomaterials used. 3D biofabrication is gaining increased traction with enhanced additive manufacturing technologies. Yet, high print resolution and efficiency for the fabrication of complex constructs still prove to be challenging. An intricate balance between biomaterial composition, machine maneuverability, and extrusion mechanism is required. While soft bioinks are highly desirable when used as a biodegradable scaffold material for tissue and organ fabrication, mechanical s

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Costanza, Girolamo, Angelo Del Ferraro, and Maria Elisa Tata. "Experimental Set-Up of the Production Process and Mechanical Characterization of Metal Foams Manufactured by Lost-PLA Technique with Different Cell Morphology." Metals 12, no. 8 (2022): 1385. http://dx.doi.org/10.3390/met12081385.

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A flexible and versatile method for manufacturing open-cell metal foams, called lost-PLA, is presented in this work. With a double extruder 3D printer (FDM, Ultimaker S3, Utrecht, The Netherlands), it is possible to make polymer-based samples of the lost model. Through CAD modeling, different geometries were replicated so as to get black PLA samples. This method combines the advantages of rapid prototyping with the possibility of manufacturing Al-alloy specimens with low time to market. The production process is articulated in many steps: PLA foams are inserted into an ultra-resistant plaster

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Chaurasia, Parul, Richa Singh, and Sanjeev Kumar Mahto. "FRESH-based 3D bioprinting of complex biological geometries using chitosan bioink." Biofabrication, June 28, 2024. http://dx.doi.org/10.1088/1758-5090/ad5d18.

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Abstract Traditional three-dimensional (3D) bioprinting has always been associated with the challenge of print fidelity of complex geometries due to the gel-like nature of the bioinks. Embedded 3D bioprinting has emerged as a potential solution to print complex geometries using proteins and polysaccharides-based bioinks. This study demonstrated the Freeform Reversible Embedding of Suspended Hydrogels (FRESH) 3D bioprinting method of chitosan bioink to 3D bioprint complex geometries. 4.5% chitosan was dissolved in an alkali solvent to prepare the bioink. Rheological evaluation of the bioink des

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Sullivan, Anthony, Anil Saigal, and Michael A. Zimmerman. "Structure-property-processing relationships in extruded liquid crystal polymer film." Polymers and Polymer Composites, April 7, 2021, 096739112110070. http://dx.doi.org/10.1177/09673911211007019.

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Liquid crystal polymers (LCPs) derive favorable mechanical, chemical, and electrical behavior from long-range molecular ordering. The microstructure gives rise to anisotropic bulk properties that are problematic for industrial applications, and thus the ability to model the polymer directionality is essential to the design of isotropic material manufacturing processes. This investigation proposes a modeling methodology to simulate the 3D director field in full-scale film extrusion geometries. Wide-angle x-ray scattering (WAXS) is used to validate the predicted orientation for a standard coat-h

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Romario, Yulius Shan, Chinmai Bhat, Yu-Yang Lin, Wojciech Macek, Maziar Ramezani, and Cho-Pei Jiang. "Development of dual nozzle slurry extrusion 3D printer by integrating material extrusion and photopolymerization for the fabrication of engineered ceramics." Rapid Prototyping Journal, March 4, 2025. https://doi.org/10.1108/rpj-09-2024-0387.

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Purpose This research focuses on developing a dual-nozzle slurry-based extrusion 3D printer capable of fabricating intricate zirconia structures. The designed 3D printer combines material extrusion and photopolymerization technologies to improve material diversity, precision and cost-effectiveness. Design/methodology/approach The 3D printer design incorporates ultraviolet curing to instantly cure extruded zirconia slurry thereby, eliminating the need for a step-wise curing procedure. Printing parameters were optimized to achieve high-quality prints, and supports made of polyethylene terephthal

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Kodali, Deepa, Chibu O. Umerah, Mohanad O. Idrees, S. Jeelani, and Vijaya K. Rangari. "Fabrication and characterization of polycarbonate-silica filaments for 3D printing applications." Journal of Composite Materials, September 2, 2021, 002199832110447. http://dx.doi.org/10.1177/00219983211044748.

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Owing to its robustness, ability to achieve complex geometries, and ease of use, 3D printing has become one of the noteworthy applications in the field of engineering. Polycarbonate has become a thermoplastic of interest due to its excellent mechanical and optical properties. Especially when infused with nanosilica, polycarbonate becomes a potential candidate for 3D printing with enhanced properties. Polycarbonate nanocomposite filaments infused with AEROSIL (nanosilica) have been melt extruded with various filler loadings of 0.5, 1, and 3 wt% and are then 3D printed. The thermal analysis of t

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Dávila, José Luis, Bruna Maria Manzini, Marcos Akira d'Ávila, and Jorge Vicente Lopes da Silva. "Open-source syringe extrusion head for shear-thinning materials 3D printing." Rapid Prototyping Journal, March 14, 2022. http://dx.doi.org/10.1108/rpj-09-2021-0245.

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Purpose This study aims to report the development of an open-source syringe extrusion head for shear-thinning materials. The target is to adapt open-source 3D printers to be helpful in research lines that use gels, hydrogels, pastes, inks, and bio-inks. Design/methodology/approach This hardware was designed to be compatible with a Graber i3-based 3D printer; nevertheless, it can be easily adapted to other open-source 3D printers. Findings The extrusion head successfully deposits the material during the 3D printing process. It was validated fabricating geometries that include scaffold structure

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Karthikeyan, Leena, Suraj Sudhi, Tushar Shriram Bhatt, et al. "Poly(ether ether ketone)s processed through extrusion-machining and 3D printing: A comparative study on mechanical, thermal and fracture properties at ambient and cryogenic environments." Journal of Elastomers & Plastics, September 25, 2020, 009524432096183. http://dx.doi.org/10.1177/0095244320961830.

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Poly Ether Ether Ketone (PEEK) is a very promising engineering thermoplastic material having capability to perform over wide service temperatures from cryogenic to around 300°C. Processing of PEEK is a challenging task, owing to its physical, thermo physical properties and chemical nature. The present paper envisages processing of PEEK by two different techniques viz, 3D printing and extrusion and assessment of properties of respective specimens at 30°C and −196°C. Thermal and mechanical properties and fracture morphological features of PEEK specimen, processed using these techniques are compa

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Zhang, Dingchang, Cristian Boffo, and David C. Dunand. "Additively-manufactured monocrystalline YBCO superconductor." Nature Communications 16, no. 1 (2025). https://doi.org/10.1038/s41467-025-56708-x.

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Abstract Single-crystal microstructures enable high-performance YBa2Cu3O7-x superconductors which are however limited to simple shapes due to their brittleness. Additive manufacturing can fabricate YBa2Cu3O7-x superconductor with complex shapes, albeit with a polycrystalline microstructure. Here, we demonstrate a route to grow single-crystals from 3D-ink-printed, polycrystalline, sintered superconducting YBa2Cu3O7-x (YBCO or Y123) + Y2BaCuO5 (Y211), manufacturing objects with complex architectures displaying both high critical current density (Jc=2.1 × 104 A.cm–2, 77 K) and high critical tempe

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Cui, Weijiu, Wenliang Liu, Ruyi Guo, et al. "Geometrical quality inspection in 3D concrete printing using AI-assisted computer vision." Materials and Structures 58, no. 2 (2025). https://doi.org/10.1617/s11527-025-02594-0.

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Abstract 3D concrete printing is an innovative technology poised to transform the construction industry by enabling the automated, layer-by-layer creation of structures directly from digital models. This approach offers numerous advantages over traditional construction methods, including reduced labor costs, faster build times, and the ability to produce complex geometries with high precision. However, unlike conventional mold-cast concrete, 3D printable concrete must support itself without external formwork, posing significant challenges related to material deformation during the printing pro

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George, Kyle, Nader Taheri‐Qazvini, Peter D. Olmsted, and Monirosadat Sadati. "Processing Parameter‐Performance Nexus in 3D Printing of Nanostructured Chiral Photonics." Small, January 19, 2025. https://doi.org/10.1002/smll.202407658.

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AbstractPrecisely crafted hierarchical architectures found in naturally derived biomaterials underpin the exceptional performance and functionality showcased by the host organism. In particular, layered helical assemblies composed of cellulose, chitin, or collagen serve as the foundation for some of the most mechanically robust and visually striking natural materials. By utilizing structured materials in additive manufacturing techniques such as extrusion‐based 3D printing, the intrinsic deformation process can be used to implement bottom‐up design of printed constructs, offering the potential

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Ovy, S. M. Al Islam, Gianni Stano, Gianluca Percoco, Matteo Cianchetti, and Yonas Tadesse. "Inexpensive monolithic additive manufacturing of silicone structures for bio-inspired soft robotic systems." Engineering Research Express, January 23, 2023. http://dx.doi.org/10.1088/2631-8695/acb587.

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Abstract In soft robotics, the fabrication of extremely soft structures capable of performing bio-inspired complex motion is a challenging task. In this paper, an innovative 3D printing of soft silicone structures with embedded shape memory alloy (SMA) actuators are proposed, which is completed in a single printing cycle from CAD files. The proposed custom-made 3D printing setup, based on the material extrusion (MEX) method, was used in conjunction with a cartesian pick and place robot (CPPR) to completely automate the fabrication of thick silicone skins (7 mm) with embedded shape memory alloy

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Francis, Ryan M., Irina Kopyeva, Nicholas Lai, et al. "Rapid and Inexpensive Image‐Guided Grayscale Biomaterial Customization via LCD Printing." Journal of Biomedical Materials Research Part A 113, no. 4 (2025). https://doi.org/10.1002/jbm.a.37897.

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ABSTRACTHydrogels are an important class of biomaterials that permit cells to be cultured and studied within engineered microenvironments of user‐defined physical and chemical properties. Though conventional 3D extrusion and stereolithographic (SLA) printing readily enable homogeneous and multimaterial hydrogels to be formed with specific macroscopic geometries, strategies that further afford spatiotemporal customization of the underlying gel physicochemistry in a non‐discrete manner would be profoundly useful toward recapitulating the complexity of native tissue in vitro. Here, we demonstrate

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Schäfke, Florian Patrick, Frederic Timmann, Christian Klose, André Hürkamp, Klaus Dröder, and Hans Jürgen Maier. "Development of EN AW-6082 Metal Foams and Stochastic Foam Modeling for the Individualization of Extruded Profiles." Journal of Materials Engineering and Performance, December 20, 2023. http://dx.doi.org/10.1007/s11665-023-09031-9.

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AbstractLightweight design and hybrid components enable innovative and new component concepts, especially when combining structurally reliable metal components with individualized polymer components. In this research, a process for additive manufacturing polymers on the surface of extruded aluminum profiles is examined. The extrusion process is adapted to produce foamable aluminum profiles, which can be utilized to enable a form fit between the two materials and ensures sufficient bond strength. For this purpose, a novel aluminum block material based on the standard wrought alloy EN AW-6082 wa

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Kim, Jihyun, Seol‐Ha Jeong, Brendan Craig Thibault, et al. "Large Scale Ultrafast Manufacturing of Wireless Soft Bioelectronics Enabled by Autonomous Robot Arm Printing Assisted by a Computer Vision‐Enabled Guidance System for Personalized Wound Healing." Advanced Healthcare Materials, November 15, 2024. http://dx.doi.org/10.1002/adhm.202401735.

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AbstractA Customized wound patch for Advanced tissue Regeneration with Electric field (CARE), featuring an autonomous robot arm printing system guided by a computer vision‐enabled guidance system for fast image recognition is introduced. CARE addresses the growing demand for flexible, stretchable, and wireless adhesive bioelectronics tailored for electrotherapy, which is suitable for rapid adaptation to individual patients and practical implementation in a comfortable design. The visual guidance system integrating a 6‐axis robot arm enables scans from multiple angles to provide a 3D map of com

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Cai, Betty, David Kilian, Sadegh Ghorbani, et al. "One-step bioprinting of endothelialized, self-supporting arterial and venous networks." Biofabrication, January 16, 2025. https://doi.org/10.1088/1758-5090/adab26.

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Abstract Advances in biofabrication have enabled the generation of freeform perfusable networks mimicking vasculature. However, key challenges remain in the effective endothelialization of these complex, vascular-like networks, including cell uniformity, seeding efficiency, and the ability to pattern multiple cell types. To overcome these challenges, we present an integrated fabrication and endothelialization strategy to directly generate branched, endothelial cell-lined networks using a diffusion-based, embedded 3D bioprinting process. In this strategy, a gelatin microparticle sacrificial ink

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Nayak, Vasudev Vivekanand, Vijayavenkataraman Sanjairaj, Rakesh Kumar Behera та ін. "Direct inkjet writing of polylactic acid/β‐tricalcium phosphate composites for bone tissue regeneration: A proof‐of‐concept study". Journal of Biomedical Materials Research Part B: Applied Biomaterials 112, № 4 (2024). http://dx.doi.org/10.1002/jbm.b.35402.

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AbstractThere is an ever‐evolving need of customized, anatomic‐specific grafting materials for bone regeneration. More specifically, biocompatible and osteoconductive materials, that may be configured dynamically to fit and fill defects, through the application of an external stimulus. The objective of this study was to establish a basis for the development of direct inkjet writing (DIW)‐based shape memory polymer‐ceramic composites for bone tissue regeneration applications and to establish material behavior under thermomechanical loading. Polymer‐ceramic (polylactic acid [PLA]/β‐tricalcium ph

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Tagliavini, Giorgia, Federico Solari, and Roberto Montanari. "CFD Simulation of a Co-rotating Twin-screw Extruder: Validation of a Rheological Model for a Starch-Based Dough for Snack Food." International Journal of Food Engineering 14, no. 2 (2017). http://dx.doi.org/10.1515/ijfe-2017-0116.

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AbstractThe extrusion of starch-based products has been a matter of interest, especially for the pasta and the snack food production. In recent years, twin-screw extruders for snack food have been studied from both structural and fluid dynamics viewpoints. This project started from the rheological characterization of a starch-based dough (corn 34 wt%, tapioca 32 wt%), comparing viscosity values acquired in laboratory with different theoretical models found in literature. A computational fluid dynamic (CFD) simulation recreating the simple case of a fluid flow between two parallel plates was ca

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Idogava, Henrique Takashi, Daniel Marcos Souza do Couto, Leonardo Santana, Jorge Lino Alves, and Zilda Castro Silveira. "AltPrint: new filling and slicing process planning based on deposited material with geometry variation." Rapid Prototyping Journal, May 12, 2023. http://dx.doi.org/10.1108/rpj-06-2022-0208.

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Purpose This paper aims to address the development and implementation of “AltPrint,” a slicing algorithm based on a new filling process planning from a variation in the deposited material geometry. AltPrint enables changes in the extruded material flow toward local variations in stiffness. The technical feasibility evaluation was conducted experimentally by fused filament fabrication (FFF) process of snap-fit subjected to a mechanical cyclical test. Design/methodology/approach The methodology is based on the estimation of the parameter E from the mathematical relationships among the variation

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Bierach, Christopher, Alexsander Alberts Coelho, Michela Turrin, Serdar Asut, and Ulrich Knaack. "Wood-based 3D printing: potential and limitation to 3D print building elements with cellulose & lignin." Architecture, Structures and Construction, March 15, 2023. http://dx.doi.org/10.1007/s44150-023-00088-7.

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AbstractUnder urgent sustainability targets, the building industry craves for renewable and recyclable biomaterials as cellulose is a fiber; Lignin is a plant-derived low-cost polymer with remarkable properties, yet its valorization is in its infancy. Recent studies have shown potentials to combine cellulose and lignin into a renewable bio-based material for the built environment, with the use of additive manufacturing to allow geometric customization and local control of material. However, previous studies also highlighted crucial issues to be solved. One main challenge is the lack of knowled

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