摘要
提出沉积岩的一种时间效应模型。沉积岩的固有各向异性用一个标量各向异性参数描述,引入一个损伤因子来考虑时间效应,材料的单轴抗压强度是时间、微结构张量和应力的函数。建立了一个描述各向异性沉积岩变形过程的全塑性模型。用提出的模型对一些试验进行了模拟,结果表明该模型能有效地描述沉积岩的固有各向异性及其时间效应。
A time-effective model of sedimentary rocks is presented. The inherent anisotropy of this kind of materials is described with a scalar anisotropy parameter. The time effect is considered with a damage factor. The uniaxial compressive strength is the function of time,microstructure tensor and stress. A complete plasticity model describing the deformation process in anisotropic sedimentary rocks is given. Several triaxial tests are simulated with the presented model,the results show the inherent anisotropy an...
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2002年第11期1598-1601,共4页
Chinese Journal of Rock Mechanics and Engineering
关键词
各向异性
沉积岩
微结构张量
时间效应
anisotropy
sedimentary rocks
microstructure tensor
time effect
