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Elastic Properties of a Tungsten-Silver Composite by Reconstruction and Computation.


pdf icon 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.