Figure 5: Mechanical properties of polycrystalline methane hydrates under different external conditions.
From: Mechanical instability of monocrystalline and polycrystalline methane hydrates
Stress–strain relationships for polycrystalline hydrates with a grain size of 19.6 nm at (a) 283.15 K and various confining pressures from 10 to 50 MPa, and at (b) a confining pressure of 10 MPa and temperatures ranging from 203.15 to 283.15 K. (c) Maximum strength of polycrystals as a function of temperature, as well as the corresponding experimental data for both water ice and methane clathrate20,21,37,47 measured at strain rates of 3.5 × 10−4 to 3.5 × 10−7.
