Generalized models for unidirectional anisotropic properties of 3D printed polymers
ISSN: 1355-2546
Article publication date: 7 July 2020
Issue publication date: 20 August 2020
Abstract
Purpose
The purpose of this paper is to empirically determine general models and methods for yield strength and modulus at different print orientations adequate for design purposes associated with typical fused deposition modeled (FDM) components/parts. Emphasis was placed on characterizing the impacts of anisotropy and resulting trends independent of material toward developing a method that matched the level of engineering required for current limited structural capabilities of FDM.
Design/methodology/approach
Tensile tests were performed with a range of unidirectional filament orientations of three different materials allowing for determination of the generalized models, which are then compared to previous findings of others.
Findings
Though anisotropic trends were similar to previous findings, minimum yield strength was found to be associated with filaments 75° from the loading direction resulting in a sinusoidal generalization. Modulus was found to be best approximated with an exponential decay. Resulting models allow for determination of yield strength and modulus in any orientation of FDM-printed material based on minimal testing.
Originality/value
This study is the widest range of angles and materials to be tested and analyzed for unidirectional FDM allowing for new trends to be identified. In line with the level of engineering required for most FDM components/parts, the resulting generalized models allow for determination of yield strength and modulus with less computation and minimal testing.
Keywords
Acknowledgements
The authors wish to acknowledge the undergraduate researchers who made this work possible including Christian Zoeger and Jeffrey Huang. They are also grateful for the support from the Hudson Valley Advanced Manufacturing Center and its director, Daniel Freedman.
Citation
Nelson, J.W., Atkins, D., Gottstine, M.L., Yang, J., Garapic, G., Jaminion, S., Nelson, A. and Wilson, K. (2020), "Generalized models for unidirectional anisotropic properties of 3D printed polymers", Rapid Prototyping Journal, Vol. 26 No. 8, pp. 1453-1462. https://doi.org/10.1108/RPJ-03-2019-0083
Publisher
:Emerald Publishing Limited
Copyright © 2020, Emerald Publishing Limited