MgO及其它矿物质的体积弹性模量和剪切模量与温度间关系研究(英文)

TEMPERATURE DEPENDENCE OF BULK MODULUS AND SHEAR MODULUS FOR MgO AND OTHER MINERALS

通过假设泊松比率和无量纲参量在温度T高于德拜温度时与温度无关 ,推导出了体积弹性模量BT(T)和剪切模量G(T)与温度T之间的关系 .将推得的关系式应用于计算 8种矿物质的BT 和G 。

In the present paper, the temperature dependence of the isothermal bulk modulus B T(T) and the isotropic shear modulus G(T) are investigated. The relationships for B T(T) and G(T) are discussed with the assumptions that the dimensionless thermoelastic parameter Γ and the isothermal Poisson's ratio σ T are independent of temperature T when T is higher than the Debye temperature Θ D. These relations are used to calculate the values of B T(T) and G(T) at different temperatures T for eight minerals. The results are found to present close agreement with the experimental data.