Abstract
Recently developed methods for estimating the effective behavior of nonlinear composites are reviewed. The methods follow from variational principles expressing the effective behavior of the given nonlinear composites in terms of the behavior of suitably chosen “linear comparison” composites. These methods allow the use of classical bounds and estimates (e.g. Hashin-Shtrikman, effective medium approximations) for linear materials to generate corresponding information for nonlinear ones. Comparisons are made with numerical simulations for metalmatrix composites, showing that the new methods are significantly more accurate than earlier ones, especially at high nonlinearity and heterogeneity contrast. The methods can be extended to incorporate evolution of the microstructure and its influence on the effective response under finite-strain conditions. An application to a forming process involving a porous metal is considered for illustrative purposes.
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Ponte Castañeda, P., Suquet, P. (2001). Nonlinear Composites and Microstructure Evolution. In: Aref, H., Phillips, J.W. (eds) Mechanics for a New Mellennium. Springer, Dordrecht. https://doi.org/10.1007/0-306-46956-1_17
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DOI: https://doi.org/10.1007/0-306-46956-1_17
Publisher Name: Springer, Dordrecht
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