International Conference on Gas Hydrates (ICGH) (6th : 2008)

FIRST-PRINCIPLES STUDY ON MECHANICAL PROPERTIES OF CH4 HYDRATE Miranda, Caetano R.; Matsuoka, Toshifumi

Abstract

The structural and mechanical properties of s-I methane hydrate have been investigated by first principles calculations. For the first time, the fully elastic constant tensor of s-I methane hydrate is obtained entirely ab-initio. The calculated lattice parameter, bulk modulus, and elastic constants were found to be in good agreement with experimental data at ambient pressure. The Young modulus, Poisson ratio and bulk sound velocities are estimated from the calculated elastic constants and compared with wave speed measurements available.

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