Mater.Sci.Technol. 19, 1107-1114
D. Duschlbauer, H.J. Böhm and H.E. Pettermann
Institute of Lightweight Structures and Aerospace
TU Wien, Vienna, Austria
The thermal conductivity of metal matrix composites is investigated by
computational simulations, in which the effect of a thermal barrier resistance
between the constituent phases is explicitly taken into account.
A numerical unit cell approach, which is based on the finite element method, an
analytical mean field method of the Mori-Tanaka type and bounding techniques
To predict the effective conductivities of fibre composites two different types
of unit cell are utilised for the numerical studies.
Two dimensional unit cells are developed which allow for investigations of
aligned, continuous fibre reinforced composites while three dimensional unit
cells are employed to study a large variety of different arrangements of
non-staggered and staggered aligned short fibres.
In the case of short fibres the thermal barrier resistances of the end faces
and of the cylindrical surfaces are modelled independently, which allows one to
study both their individual and their combined influences on the overall
Results are presented for carbon fibre/copper composites and their overall
thermal conductivities are investigated in terms of interfacial thermal
barriers and microtopologies.