摘要
引入煤岩对气体的吸附势函数,并假定吸附势函数是引起多孔介质变形和应力的一个因素,给出了考虑CO2吸附的煤岩热弹性模型的一般形式,分析了CO2吸附对煤岩热弹性模型的影响。结果表明,在弹性范围内,吸附势函数是通过改变热传导方程和热传导的热力学限制条件来间接影响介质的应力和变形的,而对应力-应变之间的关系表达式的形式没有影响。一旦给出自由能函数和吸附势函数的形式,就可以确定考虑气体吸附条件下介质的热弹性本构模型。
An adsorption potential function produced by the interaction between gas and solid skelecton is introduced and regarded as a factor for the stress and deformation of the solid skeleton especially for the swelling of the coal. A general form of the thermoelastic constitutive model of coal is given considering the adsorption of CO2. After the thermodynamic analysis of the constitutive relation, it is found that the adsorption potential affects the stress and deformation indirectly through remodeling the form of the heat transfer equation and changing the thermodynamic restriction condition. But it doesn＇t change the form of stress-strain relation. A constitutive model can be built the moment that the free energy function and adsorption potential are given.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第11期1974-1976,1982,共4页
Rock and Soil Mechanics
关键词
CO2吸附
热弹性模型
吸附势
膨胀
CO2 adsorption
thermoelastic model
adsorption potential
swelling
