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Computation of thermal properties via 3D homogenization of multiphase materials using FFT-based accelerated scheme
In this paper we study the thermal effective behaviour for 3D multiphase composite
material consisting of three isotropic phases which are the matrix, the inclusions
and the coating media. For this purpose we use an accelerated FFT-based scheme
initially proposed in Eyre and Milton (1999) to evaluate the thermal conductivity
tensor. Matrix and spherical inclusions media are polymers with similar properties
whereas the coating medium is metallic hence better conducting. Thus, the contrast
between the coating and the others media is very large. For our study, we use RVEs
(Representative volume elements) generated by RSA (Random Sequential Adsorption)
method developed in our previous works, then, we compute effective thermal
properties using an FFT-based homogenization technique validated by comparison
with the direct finite elements method. We study the thermal behaviour of the 3Dmultiphase
composite material and we show what features should be taken into account
to make the computational approach efficient