Fourth-rank tensors of Voigt's symmetry and elastic material constants for all systems of 2D crystals

Details Fourth-rank tensors of Voigt's symmetry and elastic material constants for all systems of 2D crystals Fourth-rank tensors of Voigt's symmetry and elastic material constants for all systems of 2D crystals

2006-07-06

arxiv.org/abs/cond-mat/0607156v1

Physics

Condensed Matter

Materials Science

13 pages, no figures

Scientific paper

Fourth-rank tensors of complete Voigt's symmetry, that embody the elastic properties of crystalline anisotropic substances, were constructed for all 2D crystal systems. Using them we obtained explicit expressions for inverse of Young's modulus E, inverse of shear modulus G and Poisson's ratio, which depend on components of the elastic compliances tensor S, on direction cosines of vectors n of uniaxial load and the vector m of lateral strain with crystalline symmetry axes. All 2D crystal systems are considered. Such representation yields decomposition of the above elastic characteristics to isotropic and anisotropic parts. Expressions for Poisson's coefficient are well suited for studying the property of auxeticity and anisotropy 2D crystals. Phase velocities are calculated for all 2D crystal classes.

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