Multiscale modeling of the elastic behavior of architectured and nanostructured Cu-Nb composite wires

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:121

Article

Gu, T.^1,2  Castelnau, O.¹  Forest, S.²  Herve-Luanco, E.^2,3  Lecouturier, F.⁴  Proudhon, H.²  Thilly, L.⁵ 

[1] CNAM, CNRS, PIMM, UMR 8006,Arts & Metiers ParisTech, 151 Bd Hop, F-75013 Paris, France

[2] Mines ParisTech, CNRS, Ctr Mat, UMR 7633, BP 87, F-91003 Evry, France

[3] Univ Versailles St Quentin En Yvelines, 45 Ave Etats Unis, F-78035 Versailles, France

[4] UJF, CNRS, INSA, UPS,Lab Natl Champs Magnet Intenses,UPR 3228, 143 Ave Rangueil, F-31400 Toulouse, France

[5] Univ Poitiers, CNRS, Inst Pprime, UPR 3346,ISAE ENSMA,SP2MI, Blvd Marie & Pierre Curie,BP 30179, F-86962 Futuroscope, France

关键词: Multiscale modeling;    Architectured material;    Polycrystalline material;    Nanostructure;    Elasticity;    Homogenization scheme;    Finite element modeling;    Copper niobium composite;   

DOI  :  10.1016/j.ijsolstr.2017.05.022

来源: Elsevier

【 摘 要 】

Nanostructured and architectured copper niobium composite wires are excellent candidates for the generation of intense pulsed magnetic fields (> 90T) as they combine both high strength and high electrical conductivity. Multi-scaled Cu-Nb wires are fabricated by accumulative drawing and bundling (a severe plastic deformation technique), leading to a multiscale, architectured, and nanostructured microstructure exhibiting a strong fiber crystallographic texture and elongated grain shapes along the wire axis. This paper presents a comprehensive study of the effective elastic behavior of this composite material by three multi-scale models accounting for different microstructural contents: two mean-field models and a full field finite element model. As the specimens exhibit many characteristic scales, several scale transition steps are carried out iteratively from the grain scale to the macro-scale. The general agreement among the model responses allows suggesting the best strategy to estimate the effective behavior of Cu-Nb wires and save computational time. The importance of crystallographical and morphological textures in various cases is discussed. Finally, the models are validated by available experimental data with a good agreement. (C) 2017 Elsevier Ltd. All rights reserved.

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