In order to input conductivity for a composite material in abaqus should we give orthotropic conductivity in the material module? If so, is it found experimentally?
Anisotropic thermal conductivity for a thin CFRP material could be measured experimentally using a transient plane source technique such as that provided by the Hot Disk equipment (hotdisk.se) for example. Silas E. Gustafsson pioneered this technique and founded the Hot Disk company.
D. P. Bentz
Prof. Bentz,
So it should be measured experimentally, and there is no way to find the composite Kappa with the fiber and matrix kappa in hand?
So, if you know the volume fractions of matrix and fiber and their individual conductivities, you can compute upper and lower bounds, such as parallel and serial (fair) or Hashin-Shtrikman (better) bounds to estimate the composite properties. Alternately, you could obtain a 3-D digital image model (volume) of the microstructure either via some type of simulation model or via CT (computed tomography using either x-rays or perhaps neutrons). This model along with the individual component properties could be used as input into a computer program that will compute the 3-D conductivity (electrical or thermal) or diffusivity of the microstructure, such as the freely available computer codes developed by E.J. Garboczi .
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