Analytic prediction of structural stress-strain relations of microstructured metal

Yang, Chunhui, Sabirov, Ilchat, Mullins, Jonathan and Hodgson, Peter 2008, Analytic prediction of structural stress-strain relations of microstructured metal, Advanced materials research, vol. 32, pp. 83-86, doi: 10.4028/www.scientific.net/AMR.32.83.

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Title Analytic prediction of structural stress-strain relations of microstructured metal
Author(s) Yang, Chunhui
Sabirov, Ilchat
Mullins, Jonathan
Hodgson, Peter
Journal name Advanced materials research
Volume number 32
Start page 83
End page 86
Total pages 4
Publisher Trans Tech Publications Ltd
Place of publication Stafa-Zurich, Switzerland
Publication date 2008
ISSN 1022-6680
Keyword(s) multi-modal microstructure
multiscale modelling
nickel
stress strain relations
unit cell approach
Summary Nanostructured and ultra-fine grained metals have higher strength but extremely limited ductility compared to coarse grained metals. However, their ductility can be greatly improved by introducing a specific range of grain sizes in the microstructures. In the paper, multiscale unit cell approach (UCA) is developed and applied to predict the averaged stress-strain relations of the multiscale microstructure metals. The unit cell models are three-phase structured at different scale lengths of 100 nm, 1 μm and 10 μm with different volume fractions and periodic boundary conditions. The contributions of multi-scale microstructures to the macroscopic structural properties of metals are also studied using a analytic approach—two-step mean-field method (TSMF), where three microstructural parameters are introduced and thus mechanical properties such as strength and ductility are presented as a function of these parameters. For verification of these proposed numerical and theoretical algorithms, the structural properties of the pure nickel with three-grain microstructures are studied and the results from FEA and the proposed theory have good agreement.
Language eng
DOI 10.4028/www.scientific.net/AMR.32.83
Field of Research 091307 Numerical Modelling and Mechanical Characterisation
Socio Economic Objective 861206 Structural Metal Products
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2008, Trans Tech Publications
Persistent URL http://hdl.handle.net/10536/DRO/DU:30017526

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