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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/8687

Title: Environmental ageing of epoxy-based stereolithography parts. Part 2: effect of absorbed moisture on mechanical properties
Authors: Ashcroft, Ian A.
Altaf, Kazim
Saleh, Naguib
Hague, Richard J.M.
Keywords: Stereolithography
Diffusion
Mechanical properties
Dual Fickian
Stiffness
FEA
Issue Date: 2012
Publisher: Maney Publishing (on behalf of the Institute of Materials, Minerals and Mining)
Citation: ASHCROFT, I.A. ... at al, 2012. Environmental ageing of epoxy-based stereolithography parts. Part 2: effect of absorbed moisture on mechanical properties. Plastics, Rubber and Composites: Macromolecular Engineering, 41 (3), pp. 129-136.
Abstract: The first part of this paper demonstrated how the quasi-Fickian moisture uptake exhibited by stereolithography resins could be modelled. This part outlines the effect of moisture absorption on the mechanical properties of one of the materials. Fickian and dual-Fickian diffusion models, using both analytical and FEA techniques were used to model the moisture uptake in aged samples. Uniaxial tensile testing of dog-bone samples revealed a decrease in elastic modulus and yield stress and an increase in strain to failure with increased moisture content. A model has been developed to predict the change in stiffness of aged samples over time. The results produced from this model show a good correlation to the experimental data and FEA predictions. It is proposed that FEA based coupled stress-diffusion analysis methods can be used to predict the effect of moisture on the mechanical performance of parts made by SL when used in service.
Version: Accepted for publication
URI: https://dspace.lboro.ac.uk/2134/8687
Publisher Link: http://maney.co.uk/index.php/journals/prc/?back=1
ISSN: 1465-8011
1743-2898
Appears in Collections:Published Articles (Mechanical and Manufacturing Engineering)

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