Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath

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 dist...

Full description

Saved in:
Bibliographic Details
Main Authors: Li, Mingyang, Liu, Zhixin, Ho, Jin Yao, Wong, Teck Neng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2023
Subjects:
Online Access:https://hdl.handle.net/10356/169284
Tags: Add Tag
No Tags, Be the first to tag this record!
Institution: Nanyang Technological University
Language: English
id sg-ntu-dr.10356-169284
record_format dspace
spelling sg-ntu-dr.10356-1692842023-07-12T15:37:04Z Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath Li, Mingyang Liu, Zhixin Ho, Jin Yao Wong, Teck Neng School of Mechanical and Aerospace Engineering Singapore Centre for 3D Printing Engineering::Mechanical engineering Additive Manufacturing Cementitious Materials 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 cementitious material non-homogeneity by rationally developing new nozzle geometries that passively compensate the differential deposition rate encountered in conventional rectangular nozzles. Using two-phase numerical study, we showed that our strategy has the potential of achieving a homogeneous mass distribution even when the nozzle travel speed is unfavorably high, while filament from a rectangular nozzle remains highly non-homogenous. The material distribution unevenness can be reduced from 1.35 to 1.23 and to 0.98 after adopting trapezoid and gaussian nozzles, indicating improvements of 34.3% and 94.2%, respectively. This work not only outlines the methodology for improving the quality of corner/curved features in 3DCMP, but also introduces a new strategy which can be adopted for other extrusion-based fabrication techniques with high material inertia. National Research Foundation (NRF) Published version This research is supported by the National Research Foundation, Singapore, Prime Minister’s Office, Singapore under its Medium-Sized Centre funding scheme, Singapore Centre for 3D Printing, Chip Eng Seng Corporation Ltd., CES_SDC Pte. Ltd., and CES_INNOVFAB Pte. Ltd. 2023-07-11T05:07:31Z 2023-07-11T05:07:31Z 2023 Journal Article Li, M., Liu, Z., Ho, J. Y. & Wong, T. N. (2023). Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath. Fluids, 8(3), 87-. https://dx.doi.org/10.3390/fluids8030087 2311-5521 https://hdl.handle.net/10356/169284 10.3390/fluids8030087 2-s2.0-85151158689 3 8 87 en Fluids © 2023 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Mechanical engineering
Additive Manufacturing
Cementitious Materials
spellingShingle Engineering::Mechanical engineering
Additive Manufacturing
Cementitious Materials
Li, Mingyang
Liu, Zhixin
Ho, Jin Yao
Wong, Teck Neng
Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath
description 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 cementitious material non-homogeneity by rationally developing new nozzle geometries that passively compensate the differential deposition rate encountered in conventional rectangular nozzles. Using two-phase numerical study, we showed that our strategy has the potential of achieving a homogeneous mass distribution even when the nozzle travel speed is unfavorably high, while filament from a rectangular nozzle remains highly non-homogenous. The material distribution unevenness can be reduced from 1.35 to 1.23 and to 0.98 after adopting trapezoid and gaussian nozzles, indicating improvements of 34.3% and 94.2%, respectively. This work not only outlines the methodology for improving the quality of corner/curved features in 3DCMP, but also introduces a new strategy which can be adopted for other extrusion-based fabrication techniques with high material inertia.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Li, Mingyang
Liu, Zhixin
Ho, Jin Yao
Wong, Teck Neng
format Article
author Li, Mingyang
Liu, Zhixin
Ho, Jin Yao
Wong, Teck Neng
author_sort Li, Mingyang
title Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath
title_short Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath
title_full Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath
title_fullStr Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath
title_full_unstemmed Improving homogeneity of 3D-printed cementitious material distribution for radial toolpath
title_sort improving homogeneity of 3d-printed cementitious material distribution for radial toolpath
publishDate 2023
url https://hdl.handle.net/10356/169284
_version_ 1772825323010785280