Developments in Ceramic Materials Research

208
M. A. Sheik
CONCLUSIONS
Unit Cell Modelling technique is useful for thermal transport analysis of composites.
Based on the DLR-XT Unit Cell modelling with sub-modelling of manufacturing porosities
for capturing sequential material degradation and also on just bulk porosity introduction in
HITCO, this approach has been shown successfully for even complex weaves like 8-harness
satin. A bulk porosity of 11% has been accommodated within the matrix with reduction in the
matrix thermal conductivity, managed by using the ‘rule of mixtures’.
Comparison of FE analyses results from ABAQUS with the experimental results have
shown good agreement, with emphasis to the extent of individual role of different porosities
in DLR-XT. In material by HITCO, the variability has been seen due to the variety of
stacking orientation and phase shift between the laminas. The increased degrees-of-freedom
per RVE Unit Cell has also challenged the computational prowess of the present facilities,
prompting the use of parallel computing wisely.
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