Mechanical strain tailoring via magnetic field assisted 3D printing of iron particles embedded polymer nanocomposites

Afshari, P, Pavlyuk, M, Lira, C, Katnam, K, Bodaghi, M ORCID: https://orcid.org/0000-0002-0707-944X and Yazdani Nezhad, H, 2023. Mechanical strain tailoring via magnetic field assisted 3D printing of iron particles embedded polymer nanocomposites. Macromolecular Materials and Engineering, 308 (11): 2300194. ISSN 1438-7492

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Abstract

The development of efficient, energy-saving, and automated manufacturing of free-form variable-thickness polymer composite components has created a step-change and enabled technology for the composites industry seeking geometry tailoring during a mould-less and/or additive manufacturing such as that in 3D printing. The current article presents research on magnetic field assisted 3D printing of iron particles-embedded thermoplastic polylactic acid, during a fused deposition method based 3D printing. The magnets are symmetrically fixed on both sides of the printed nanocomposite. The setup utilised Neodymium magnets with a constant strength below one Tesla. Observations have shown that the nanocomposites being printed undergo permanent macro-scale deformations due to the extrinsic strains induced by the iron particles' magnetisation. To provide a theoretical understanding of the induced strains, a Multiphysics constitutive equation has been developed. The evolution of magnetisation within a relatively thick nanocomposite (5 mm thickness) has been studied. A correlation has been established between the extrinsic strains from the experimental data and the theoretical solution. The theory exhibits an accurate description of the field-induced strains provided that real-time temperatures for the printed layers are accounted for. The results demonstrate a viable and disruptive magnetic field-equipped fabrication with ability for permanent geometry control during a process.

Item Type:	Journal article
Publication Title:	Macromolecular Materials and Engineering
Creators:	Afshari, P., Pavlyuk, M., Lira, C., Katnam, K., Bodaghi, M. and Yazdani Nezhad, H.
Publisher:	Wiley
Date:	14 November 2023
Volume:	308
Number:	11
ISSN:	1438-7492
Identifiers:	Number Type 10.1002/mame.202300194 DOI 1843859 Other
Rights:	© 2023 The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Divisions:	Schools > School of Science and Technology
Record created by:	Jeremy Silvester
Date Added:	13 Dec 2023 09:48
Last Modified:	13 Dec 2023 09:48
URI:	https://irep.ntu.ac.uk/id/eprint/50534

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