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An inverse method for determining the spatially resolved properties of viscoelastic–viscoplastic three-dimensional printed materials

Chen, X.; Ashcroft, I.; Wildman, Ricky D.; Tuck, Christopher

Authors

X. Chen

I. Ashcroft

Ricky D. Wildman



Abstract

A method using experimental nanoindentation and inverse finite-element analysis (FEA) has been developed that enables the spatial variation of material constitutive properties to be accurately determined. The method was used to measure property variation in a three-dimensional printed (3DP) polymeric material. The accuracy of the method is dependent on the applicability of the constitutive model used in the inverse FEA, hence four potential material models: viscoelastic, viscoelastic–viscoplastic, nonlinear viscoelastic and nonlinear viscoelastic–viscoplastic were evaluated, with the latter enabling the best fit to experimental data. Significant changes in material properties were seen in the depth direction of the 3DP sample, which could be linked to the degree of cross-linking within the material, a feature inherent in a UV-cured layer-by-layer construction method. It is proposed that the method is a powerful tool in the analysis of manufacturing processes with potential spatial property variation that will also enable the accurate prediction of final manufactured part performance.

Journal Article Type Article
Publication Date Nov 25, 2015
Journal Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences
Print ISSN 1364-5021
Electronic ISSN 1471-2946
Publisher Royal Society, The
Peer Reviewed Peer Reviewed
Volume 471
Issue 2183
Article Number 20150477
APA6 Citation Chen, X., Ashcroft, I., Wildman, R. D., & Tuck, C. (2015). An inverse method for determining the spatially resolved properties of viscoelastic–viscoplastic three-dimensional printed materials. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, 471(2183), https://doi.org/10.1098/rspa.2015.0477
DOI https://doi.org/10.1098/rspa.2015.0477
Keywords Nanoindentation test, Reactive inkjetting, Inverse finite-element analysis, Viscoelastic–viscoplastic
Publisher URL https://doi.org/10.1098/rspa.2015.0477
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0





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