Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/146779
Title: Stress-cognizant 3D printing of free-form concrete structures
Authors: Lim, Jian Hui
Zhang, Xu
Ting, Andrew Guan Heng
Pham, Quang-Cuong
Keywords: Engineering::Civil engineering
Issue Date: 2021
Source: Lim, J. H., Zhang, X., Ting, A. G. H. & Pham, Q. (2021). Stress-cognizant 3D printing of free-form concrete structures. Journal of Building Engineering, 39, 102221--. https://dx.doi.org/10.1016/j.jobe.2021.102221
Journal: Journal of Building Engineering 
Abstract: 3D printing enables engineers to design and manufacture geometrically complex structures. As 3D printing technology affords design freedom, it also brings along new challenges. One common property of classical 3D printing is the anisotropy arising from the filament-wise 3D printing process. This anisotropy reduces the load bearing capabilities of the 3D printed part when loaded in its weaker axes, that is the directions orthogonal to the filament. Conversely, by designing the 3D printing path through analyses of its mechanical constraints, the 3D printed part may be strengthened and printed such that it carries the majority of the load in its strongest axis, parallel to the filament (T1), thereby increasing its load-carrying capabilities. We experimentally investigated this idea by designing and printing several concrete samples following two strategies: (i) the classical strategy consisting of parallel rectilinear paths irrespective of the load distribution, and (ii) our proposed strategy consisting of paths that are as much parallel as possible to the principal stress lines. We then subjected the samples to mechanical testing. The test results confirmed that the proposed printing strategy significantly improved mechanical characteristics. Cracking patterns were also observed and discussed.
URI: https://hdl.handle.net/10356/146779
ISSN: 2352-7102
DOI: 10.1016/j.jobe.2021.102221
Rights: © 2021 Elsevier Ltd. All rights reserved. This paper was published in Journal of Building Engineering and is made available with permission of Elsevier Ltd.
Fulltext Permission: embargo_20230706
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles
SC3DP Journal Articles

Files in This Item:
File Description SizeFormat 
Stress-cognizant_3D_printing_of_free-form_concrete_structures.pdf
  Until 2023-07-06
14.41 MBAdobe PDFUnder embargo until Jul 06, 2023

Page view(s)

155
Updated on May 24, 2022

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.