FSU 3D printing researcher

Using magnets to develop innovative technique for 3D printing

Researchers from Florida State University’s High-Performance Materials Institute and the FAMU-FSU College of Engineering have developed and investigated a new technique for 3D printing that could produce much stronger materials that could be used in a variety of engineering applications.

fiber alignment

In a paper published in the journal Additive Manufacturing, recent engineering doctoral graduate Mahuparna Roy and Associate Professor of Industrial and Manufacturing Engineering Tarik Dickens showed the possibility of using magnetic fields near a 3D printer to change the alignment of fibers inside an object as it was being printed. This tweak in the mechanical properties of the material could greatly improve its overall quality and strength. Dickens, the paper’s corresponding author, calls it “magneto-assisted printing.”

3D-printed materials are not strong on their own because they’re just plastic layers sitting on top of each other,” said Roy, the paper’s lead author. “The gap in the research world is to improve mechanical properties. With improved mechanical properties, you could create solutions for any kind of application, depending on what that particular application requires.”

 

The new technique

3D printing sometimes adds fibers made from various materials to the plastic or other substances used in printing, a technique that can improve the strength of the finished piece. When those fibers come out of a nozzle, they are oriented parallel to the direction of the flow from that nozzle. But by applying a magnetic field near the printer, the researchers were able to create objects with fibers oriented perpendicular to the nozzle’s flow.

magnetic field

The alignment of fibers inside an object can give it certain useful properties, for example, more strength or electrical conductivity. Along with showing the possibility of this new technique for fiber alignment, the research also examined how different flow rates, magnetic field strength and the shapes of nozzles affected the ability to change the fiber alignment. A theoretical model developed by Bryan Quaife, assistant professor in the FSU Department of Scientific Computing, was used to study the process regime of the assisted flow-geometry.

The study found that the more viscous the printing substance, the stronger the required magnetic field for realigning the magnetic fibers. The experiments also seemed to show that as the material is moved through the nozzle faster, the less the interior fibers will be realigned.

 

Further developments

The research showed the possibility of using this technique for a material with low viscosity, so future investigations could study the process with a more viscous material that requires a stronger magnetic field to realign the interior fibers, Roy said. Mechanical tests of the finished 3D-printed product would also be helpful.

There are still plenty of gaps that need to be addressed in terms of what materials can be used and what printers can be used in conjunction with them,” Roy said. “In this work, we’re talking about using plastics with metal particles in them. We’re combining the two major groups of 3D-printing materials to make a new material that gives you added functionality when it comes to making anything else.”

Co-authors of this study include postdoctoral researcher Phong Tran. This work was supported by the National Science Foundation.

 

Featured image: Madhuparna Roy, a former engineering doctoral student and the lead author of a paper that showed the possibility of using magnets to realign fibers inside a material being used for 3D printing.

 

Source: Florida State University


Leggi anche

3D printed FRP footbridge

Il parco di Kralingse Bos, il cuore verde di Rotterdam, avrà presto una passerella pedonale realizzata in polimeri fibrorinforzati (FRP) tramite la stampa 3D. Questa passerella dovrebbe rappresentare l’inizio di una transizione verso la prossima generazione di ponti, che offriranno alte prestazioni come leggerezza, estrema versatilità, circolarità e sostenibilità…

Leggi tutto…

NUST MISIS presentation of aluminum matrix composites

Gli scienziati dei materiali dell’Università Nazionale di Scienza e Tecnologia MISIS, in Russia, hanno presentato una nuova tecnologia per la produzione di compositi a matrice di alluminio da nuove materie prime, polveri composite per la stampa 3D di componenti per aeromobili e autovetture. Il nuovo metodo aumenta del 40% l’uniformità delle proprietà e la durezza dei compositi ottenuti rispetto agli analoghi prodotti in maniera standard…

Leggi tutto…

Eco-friendly resin for Optical 3D printing Process

I ricercatori dell’Università di Vilnius e dell’Università di Tecnologia di Kaunas in Lituania hanno sviluppato una resina ecologica e riciclabile da utilizzare nell’ambito del processo di Optical 3D printing (O3P)…

Leggi tutto…

Virgin PETG

Un gruppo di ricercatori della Slovak Academy of Sciences e della Slovak University of Technology hanno sviluppato una serie di nuovi materiali ibridi a basso costo per il processo di stampa 3D FFF (Fused filament fabrication). Rafforzando il filamento di PETG (polietilene tereftalato modificato con aggiunta di glicole) vergine e riciclato con grafite espansa, fibra di carbonio e combinazioni di entrambi, il gruppo è riuscito a migliorare le proprietà meccaniche e termiche delle matrici PETG …

Leggi tutto…

La tecnologia CFIP (Continuous Fibre Injection Process) è stata sviluppata e brevettata da Eurecat Centro Tecnológico de Catalunya e consente di rinforzare parti in plastica, metalli o ceramica prodotte con stampa 3D con fibre continue in carbonio, aumentandone la resistenza e riducendo il peso…

Leggi tutto…