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Acta Mechanica
Erschienen in: Acta Mechanica 12/2020

12.09.2020 | Original Paper

A three-dimensional microstructure-based crystal plasticity model for coarse-grained and harmonic-structured Ti–6Al–4V under monotonic and cyclic shear loading

verfasst von: Xiang Wang, Jia Li, Fabien Cazes, Guy Dirras

Erschienen in: Acta Mechanica | Ausgabe 12/2020

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Abstract

This paper develops a microstructure-based numerical model to simulate the mechanical behavior of homogeneous coarse-grained (CG) and harmonic-structured (HS) Ti–6Al–4V under monotonic and cyclic simple shear loading conditions. This model incorporates a crystal plasticity model describing the deformation behavior of lamellar \(\alpha +\beta \) colonies and a scale transition rule called ‘\(\beta \)-rule’ which enables to deal with the huge contrast between grain sizes in fine-grained and coarse-grained regions in HS Ti–6Al–4V. Besides, the numerical model can be used to consider the effects of microstructural features, such as the slip geometry for lamellar \(\alpha +\beta \) colonies, length scale dependence of hardening, or anisotropic strength of the slip systems. The model is implemented into a finite element code (Cast3M) via a UMAT subroutine. The strengthening effect of harmonic structure design is studied based on the numerical results for HS Ti–6Al–4V and homogeneous CG Ti–6Al–4V. The simulation results are in good agreement with the experimental observations.
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Nächster Artikel Buckling analysis of a non-concentric double-walled carbon nanotube
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Metadaten
Titel
A three-dimensional microstructure-based crystal plasticity model for coarse-grained and harmonic-structured Ti–6Al–4V under monotonic and cyclic shear loading
verfasst von
Xiang Wang
Jia Li
Fabien Cazes
Guy Dirras
Publikationsdatum
12.09.2020
Verlag
Springer Vienna
Erschienen in
Acta Mechanica / Ausgabe 12/2020
Print ISSN: 0001-5970
Elektronische ISSN: 1619-6937
DOI
https://doi.org/10.1007/s00707-020-02780-x

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