A lattice model describing scale effects in nonlinear elasticity of nano-inhomogeneities

Details A lattice model describing scale effects in nonlinear elasticity of nano-inhomogeneities A lattice model describing scale effects in nonlinear elasticity of nano-inhomogeneities

2010-06-14

arxiv.org/abs/1006.2708v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Accepted on Phys.Rev.B (2010) (in press)

Scientific paper

We present a procedure to map the constitutive laws of elasticity (both in the linear and nonlinear regime) onto a discrete atomic lattice and we apply the resulting elastic lattice model to investigate the strain field within an embedded nano-inhomogeneity. We prove that its elastic behavior at the nanoscale is governed by relevant atomistic effects. In particular, we demonstrate that such effects on the linear and nonlinear elastic properties are described by the same scaling exponent, in a large range of elastic contrast between the matrix and the nano-inhomogeneity. This suggests that the linear and nonlinear elastic behaviors of the composite system belong to the same universality class (at least within the nanometer length scale here investigated).

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