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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.


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
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
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

Document type: Journal Article
Collection: School of Engineering and Information Technology
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