A printability index for linking slurry rheology to the geometrical attributes of 3D-printed components

被引:50
作者
Ketel, Sabrina [1 ]
Falzone, Gabriel [1 ,2 ]
Wang, Bu [1 ]
Washburn, Newell [3 ]
Sant, Gaurav [1 ,2 ,4 ]
机构
[1] Univ Calif Los Angeles, Dept Civil & Environm Engn, Lab Chem Construct Mat LC2, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90024 USA
[3] Carnegie Mellon Univ, Dept Chem, Pittsburgh, PA USA
[4] Univ Calif Los Angeles, Calif Nanosyst Inst CNSI, Los Angeles, CA USA
基金
美国国家科学基金会;
关键词
3D-printing; Rheology; Laser triangulation; Quality control; CAD; MECHANICAL-PROPERTIES; PROPERTY EVOLUTION; FLOW PROPERTIES; SUSPENSIONS; SCAFFOLDS; ALUMINA; FABRICATION; BONE; PHOTOPOLYMERIZATION; DISPERSIONS;
D O I
10.1016/j.cemconcomp.2018.03.022
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
While the field of 3D-printing (3DP; formally known as additive manufacturing) has increasingly matured, its use in large-scale applications, e.g., building and infrastructure construction, remains limited. Although layer-wise slurry deposition/extrusion (LSD/E) methods are amenable to scale-up and offer versatility in terms of the materials that can be printed (i.e., "inks" that can be used), there is a lack of quantitative metrics to assess the geometrical attributes of printed components vis-a-vis their 3D-CAD (computer-aided design) inputs. To address this limitation, we present an original method to assess the external geometrical attributes of 3D-printed components using laser triangulation-based 3D-scanning. Significantly, a printability index (0 <= I-p <= 1, unitless) is presented which compares the overall geometric fidelity of the printed specimen to its CAD input. By adjusting the rheology of a model silicate-based slurry, we examine the relationships between slurry rheology, shrinkage and printability. The printability index offers a quantitative basis for assessment and quality control of 3D printed components, while helping to develop an improved understanding of how slurry behavior, and optimizations therein can maximize printability.
引用
收藏
页码:32 / 43
页数:12
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