摘要
本文首先用损伤力学的方法,按孔隙的配置及几何结构,分别定义了含各向异性分布裂隙的固体介质的二阶连续法向裂纹张量和切向裂纹张量。然后,在裂隙内充满流体时,对组分速度、组分偏应力等混合物理论的基本变量进行了各向异性修正。并用混合物理论,建立了饱和裂隙介质中各组分的质量和动量平衡方程。最后,在仅考虑裂纹的单一张开度时,针对线弹性骨架材料,得到了由不可压缩材料构成的各组分的动力学控制方程。
This paper deals with the anisotropic dynamic theory of saturated
elastic fissured media. By introducing the concept of damage mechanics, the tangential crack tensor and the normal crack tensor are proposed to describe
the distribution and orientation of fissures, and the modern theory of mixture is used to establish the balance equations of mass and momentun for each constituent. Definitions and distinctions of macroscopic and microscopic velocities of constituents are discussed,and momentum supply representing the interaction between solid and fluid is reexamined. Linear constitutive equations for solid skeleton and average opening displacement for crack are finally postulated,
and the field governing equations of motion for each constituent are also derived
出处
《工程力学》
EI
CSCD
1993年第1期129-138,共10页
Engineering Mechanics
关键词
多孔介质
损伤因子
混合物理论
porous media, damage variable, theory of mixture, tensor of crack distribution
