摘要
本文根据岩石类材料受载时的损伤破坏机理,首次引入两个损伤变量 D_1和 D_0用以反映外载荷体量和偏量的作用,在内时理论的基础上建立起考虑温度效应的岩石损伤本构方程,并导出具有明确物理意义的本构方程增量型关系式。在不同温度下用大理岩试样进行了压缩实验和声发射实验。根据实验所得结果,确定了本构方程中材料的所有参数,得到了大理岩材料受温度影响其性质发生变化的一些有意义的结论。
According to the damage mechanism of rock materials,a sct of constitutive cquat- ions with temperature effect taken into account has been obtained by means of introdu- cing two damage variables into endochronic theory.The constitutive equations can he used to describe the rock material deformation process at different temperatures and under different loadings The damage variables represent respectively hydrostatic stress decre- ases in void rate and fracture due to deviatoric stresses.The parametcrs in the constit- utive equations can be determined by uniaxial stress-strain curves.Experiments on marb- le samples have been performed in the temperature range of 20℃—500℃ at an interval of 50℃ and all material parameters in constitutive equations were determined by experi- mental results.
出处
《岩土力学》
EI
CAS
CSCD
1991年第3期1-10,共10页
Rock and Soil Mechanics
基金
本文为国家自然科学基金课题资助项目。
