Multiscale asymptotic homogenization analysis of thermo-diffusive composite materials

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:85-86

Article

Bacigalupo, A.¹  Morini, L.²  Piccolroaz, A.² 

[1] IMT Sch Adv Studies, Piazza S Francesco 19, I-55100 Lucca, Italy

[2] Univ Trento, Dept Civil Environm & Mech Engn, Trento, Italy

关键词: Periodic microstructure;    Asymptotic homogenization;    Thermodiffusion;    Overall material properties;   

DOI  :  10.1016/j.ijsolstr.2016.01.016

来源: Elsevier

【 摘 要 】

In this paper an asymptotic homogenization method for the analysis of composite materials with periodic microstructure in presence of thermodiffusion is described. Appropriate down-scaling relations correlating the microscopic fields to the macroscopic displacements, temperature and chemical potential are introduced. The effects of the material inhomogeneities are described by perturbation functions derived from the solution of recursive cell problems. Exact expressions for the overall elastic and thermodiffusive constants of the equivalent first order thermodiffusive continuum are derived. The proposed approach is applied to the case of a two-dimensional bi-phase orthotropic layered material, where the effective elastic and thermodiffusive properties can be determined analytically. Considering this illustrative example and assuming periodic body forces, heat and mass sources acting on the medium, the solution performed by the first order homogenization approach is compared with the numerical results obtained by the heterogeneous model. (c) 2016 Elsevier Ltd. All rights reserved.

【 授权许可】

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