1882930
doi
10.1051/matecconf/201823300029
oai:zenodo.org:1882930
user-icarus-alloys
Konstantinos Tserpes
Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras
Spiros Pantelakis
Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras
Prediction of mechanical properties of nanocrystalline materials using Voronoi FE models of representative volume elements
Panagiotis Bazios
Laboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras
info:eu-repo/semantics/openAccess
Creative Commons Attribution 4.0 International
https://creativecommons.org/licenses/by/4.0/legalcode
<p>In the present work, a numerical model is developed to predict the mechanical properties of nanocrystalline materials using a Finite Element Analysis. The model is based on Representative Volume Elements (RVE) in which the microstructure of the material is described using the Voronoi tessellation algorithm. The use of the Voronoi particles was based on the observation of the morphology of nanocrystalline materials by Scanning Electron and Transmission Electron Microscopy. In each RVE, three-dimensional modelling of the grain and grain boundaries as randomlyshaped sub-volumes is performed. The developed model has been applied to pure nanocrystallline copper taking into account the parameters of grain size and grain boundary thickness. The mechanical properties of nanocrystalline copper have been computed by loading the RVE in tension. The numerical results gave a clear evidence of grain size effect and the Hall-Petch relationship, which is a consequence of macroscopic strain being preferentially accumulated at grain boundaries. On the other hand, for a given grain volume fraction, the results for elastic moduli showed no effect of the grain size. The model predictions have been validated successfully against numerical results from the literature and predictions of the Rule of Mixtures and the Mori-Tanaka analytical model.</p>
Zenodo
2018-11-21
info:eu-repo/semantics/conferencePaper
1882929
user-icarus-alloys
1579541086.083554
458484
md5:1cf1c0acdb2366523769495932b92d0c
https://zenodo.org/records/1882930/files/Prediction of mechanical properties of nanocrystalline materials using Voronoi FE models of representative volume elements.pdf
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