Elastic Properties of a Tungsten-Silver Composite by Reconstruction and Computation.
Elastic Properties of a Tungsten-Silver Composite by
Reconstruction and Computation.
Roberts, A. P.; Garboczi, E. J.
Journal of the Mechanics and Physics of Solids, Vol.
47, 2029-2055, 1999.
composite materials; elastic properties; tungsten silver
composite; elastic moduli; finite elements;
A three-dimensional model of a tungsten-silver composite
is statistically constructed from an experimental
two-dimensional image. The effective Young's modulus
(E) of the model is computed in the temperature range
25-1060 deg C using a finite element method. The
results are in good agreement with experimental data.
The reconstructed and overlapping sphere models are
examples of bi-continuous (non-particulate) media. The
computed moduli of the models are not generally in good
agreement with the predictions of the self-consistent
method. It has also been possible to evaluate the
three-point variational bounds on the Young's moduli of
the models using the results of Beran, Molyneux, Milton
and Phan-Thien. The measured data were close to the
upper bound if the properties of the two phases were