Elastic Properties of a Tungsten-Silver Composite by Reconstruction and Computation.
Elastic Properties of a Tungsten-Silver Composite by
Reconstruction and Computation.
(1841 K)
Roberts, A. P.; Garboczi, E. J.
Journal of the Mechanics and Physics of Solids, Vol.
47, 2029-2055, 1999.
Keywords:
composite materials; elastic properties; tungsten silver
composite; elastic moduli; finite elements;
reconstruction
Abstract:
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
similar.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899