- Author
-
Roberts, A. P.
|
Garboczi, E. J.
- Title
- Elastic Properties of a Tungsten-Silver Composite by Reconstruction and Computation.
- Coporate
- University of Oxford, UK
National Institute of Standards and Technology, Gaithersburg, MD
- Journal
-
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.