کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1562224 999582 2011 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Optimisation of 3D RVE for anisotropy index reduction in modelling thermoelastic properties of two-phase composites using a periodic homogenisation method
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مکانیک محاسباتی
پیش نمایش صفحه اول مقاله
Optimisation of 3D RVE for anisotropy index reduction in modelling thermoelastic properties of two-phase composites using a periodic homogenisation method
چکیده انگلیسی

In the present paper, a periodic homogenisation method is used to predict the thermomechanical properties of heterogeneous ceramics containing randomly dispersed inclusions (or pores) by modelling this complex microstructure by a Representative Volume Element (RVE) composed of a small number of inclusions (or pores). The combination of suitable RVE geometries is used to find 3D arrangements as less anisotropic as possible, in the case of ceramics with glass matrix and either alumina inclusions or pores. It is shown that anisotropy indices, in terms of elastic stiffness and thermal expansion of face-centred cubic (F.C.C.) and hexagonal close-packed (H.C.P.) arrangements are very close to the isotropic case. Therefore, these arrangements have, then, been assumed to be isotropic for the calculation of the isotropic thermoelastic properties of the model materials. A good agreement with the experimental and analytical results is observed, validating the proposed methodology.


► A periodic homogenisation method is used to predict the thermoelastic properties of two-phase composites.
► The combination of periodic conditions with RVE geometries is used to find 3D arrangements as less anisotropic as possible.
► Anisotropy indices of face-centred cubic and hexagonal close-packed arrangements were very close to the isotropic case.
► The simulated isotropic thermoelastic properties of the model materials were very close to the experimental ones.
► The next step will consist in using these quasi-isotropic arrangements with two-phase composites having damage in matrix.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Computational Materials Science - Volume 50, Issue 11, October–November 2011, Pages 3136–3144
نویسندگان
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