Physics – Condensed Matter – Materials Science
Scientific paper
2010-03-16
Journal of the Mechanics and Physics of Solids, 59 (6), 1214-1230, (2011)
Physics
Condensed Matter
Materials Science
32 pages, 8 figures
Scientific paper
10.1016/j.jmps.2011.03.006
In this paper, we study the mechanics of statistically non-uniform two-phase elastic discrete structures. In particular, following the methodology proposed in (Luciano and Willis, Journal of the Mechanics and Physics of Solids 53, 1505-1522, 2005), energetic bounds and estimates of the Hashin-Shtrikman-Willis type are developed for discrete systems with a heterogeneity distribution quantified by second-order spatial statistics. As illustrated by three numerical case studies, the resulting expressions for the ensemble average of the potential energy are fully explicit, computationally feasible and free of adjustable parameters. Moreover, the comparison with reference Monte-Carlo simulations confirms a notable improvement in accuracy with respect to approaches based solely on the first-order statistics.
Geers Marc G. D.
Peerlings Ron H. J.
Zeman Jan
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