کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
824882 1469990 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effective thermal conductivity of a composite with thermo-sensitive constituents and related problems
ترجمه فارسی عنوان
هدایت حرارتی موثر کامپوزیت با ترکیبات گرما حساس و مشکلات مرتبط
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی (عمومی)
چکیده انگلیسی

The paper focuses on the problems related to homogenization procedure for thermal conductivity of a composite with thermo-sensitive constituents (i.e. materials with conductivities dependent on temperature). It is shown that in the simplest case of non-linearity, when thermo-sensitive inhomogeneity is embedded into linearly-conductive matrix, Eshelby theorem (Eshelby, 1957, 1961) does not hold – remotely applied uniform heat flux yields a non-uniform one inside the inhomogeneity. However, in the case when both – the matrix and the inhomogeneity – are thermo-sensitive and their conductivities are proportional to each other, Eshelby theorem for heat flux does hold. For materials of this type, the concept of resistivity contribution tensors is formulated that allows one to generalize the main homogenization schemes used in micromechanics for this special case of non-linearity. The requirement of proportionality holds for many important material systems, including, in particular, porous thermo-sensitive materials or ones reinforced with superconductive inhomogeneities.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Engineering Science - Volume 80, July 2014, Pages 124–135
نویسندگان
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