Multiphysics modelling of powder bed fusion for polymers
Polymeric materials for powder bed fusion additive manufacturing have been attracting extensive research interest due to their vast potential for fabricating end-use functional parts. Here, a high-fidelity multiphysics approach combining the discrete element model with the computational fluid dynami...
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sg-ntu-dr.10356-1710802023-10-14T16:48:30Z Multiphysics modelling of powder bed fusion for polymers Tan, Pengfei Zhou, Meixin Tang, Chao Su, Yu Qi, H. Jerry Zhou, Kun School of Mechanical and Aerospace Engineering HP-NTU Digital Manufacturing Corporate Lab Singapore Centre for 3D Printing Engineering::Mechanical engineering Additive Manufacturing Selective Laser Sintering Polymeric materials for powder bed fusion additive manufacturing have been attracting extensive research interest due to their vast potential for fabricating end-use functional parts. Here, a high-fidelity multiphysics approach combining the discrete element model with the computational fluid dynamics model has been developed to simulate the printing process of polymers in powder bed fusion, involving powder recoating, melting, and coalescence. The developed approach considers particle flow dynamics, the reflection, absorption, and transmission of infrared laser radiation, and the viscous flow of polymer melt. The pore formation mechanisms due to lack of fusion and gas entrapment in polyamide 12 parts printed via selective laser sintering are studied. The simulation results reveal that lower polymer viscosity would be beneficial to the densification rate of the printed parts. Excessively small powder particles would degrade powder bed quality due to the agglomeration of polymer powder, thus leading to high porosity in the printed parts. Agency for Science, Technology and Research (A*STAR) Published version This study was supported by the RIE2020 Industry Alignment Fund–Industry Collaboration Projects (IAF–ICP) Funding Initiative, Singapore and cash and in-kind contribution from the industry partner, HP Inc. 2023-10-11T07:59:56Z 2023-10-11T07:59:56Z 2023 Journal Article Tan, P., Zhou, M., Tang, C., Su, Y., Qi, H. J. & Zhou, K. (2023). Multiphysics modelling of powder bed fusion for polymers. Virtual and Physical Prototyping, 18(1), e2257191-. https://dx.doi.org/10.1080/17452759.2023.2257191 1745-2759 https://hdl.handle.net/10356/171080 10.1080/17452759.2023.2257191 2-s2.0-85171628215 1 18 e2257191 en Virtual and Physical Prototyping © 2023 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. The terms on which this article has been published allow the posting of the Accepted Manuscript in a repository by the author(s) or with their consent. application/pdf |
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Engineering::Mechanical engineering Additive Manufacturing Selective Laser Sintering Tan, Pengfei Zhou, Meixin Tang, Chao Su, Yu Qi, H. Jerry Zhou, Kun Multiphysics modelling of powder bed fusion for polymers |
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Polymeric materials for powder bed fusion additive manufacturing have been attracting extensive research interest due to their vast potential for fabricating end-use functional parts. Here, a high-fidelity multiphysics approach combining the discrete element model with the computational fluid dynamics model has been developed to simulate the printing process of polymers in powder bed fusion, involving powder recoating, melting, and coalescence. The developed approach considers particle flow dynamics, the reflection, absorption, and transmission of infrared laser radiation, and the viscous flow of polymer melt. The pore formation mechanisms due to lack of fusion and gas entrapment in polyamide 12 parts printed via selective laser sintering are studied. The simulation results reveal that lower polymer viscosity would be beneficial to the densification rate of the printed parts. Excessively small powder particles would degrade powder bed quality due to the agglomeration of polymer powder, thus leading to high porosity in the printed parts. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Tan, Pengfei Zhou, Meixin Tang, Chao Su, Yu Qi, H. Jerry Zhou, Kun |
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Article |
author |
Tan, Pengfei Zhou, Meixin Tang, Chao Su, Yu Qi, H. Jerry Zhou, Kun |
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Tan, Pengfei |
title |
Multiphysics modelling of powder bed fusion for polymers |
title_short |
Multiphysics modelling of powder bed fusion for polymers |
title_full |
Multiphysics modelling of powder bed fusion for polymers |
title_fullStr |
Multiphysics modelling of powder bed fusion for polymers |
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Multiphysics modelling of powder bed fusion for polymers |
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multiphysics modelling of powder bed fusion for polymers |
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2023 |
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https://hdl.handle.net/10356/171080 |
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