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

Chen, X. and Ashcroft, I. and Wildman, Ricky D. and Tuck, Christopher (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). 20150477/1-20150477/23. ISSN 1471-2946

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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.

Item Type: Article
Keywords: Nanoindentation test, Reactive inkjetting, Inverse finite-element analysis, Viscoelastic–viscoplastic
Schools/Departments: University of Nottingham, UK > Faculty of Engineering > Department of Mechanical, Materials and Manufacturing Engineering
Identification Number: 10.1098/rspa.2015.0477
Depositing User: Eprints, Support
Date Deposited: 25 Jul 2017 12:32
Last Modified: 12 Oct 2017 23:32
URI: http://eprints.nottingham.ac.uk/id/eprint/44404

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