... model. 3. Damage constitutive model 3.1 Damage variables and calculations With the Kachanov s research, Rabotnov put forward on the basis of the concept of "continuity factor", as early as damage variable is defined as A type of D as damage variable, A is of the cross section area of damaged materials...

... Upstream Oil & Gas application evolution compression displacement hydraulic fracturing Artificial Intelligence damage variable damage surface normal stiffness stiffness normal-shear damage model increment loading shear loading tensile strength rock bridge interface...

... reservoir simulation tensor triaxial compression test elastic property hydraulic fracturing damage variable plane plastic deformation Reservoir Characterization Upstream Oil & Gas international journal macro scale plastic strain scaling method degradation mechanics multi...

... ABSTRACT: The complete properties of rocks under uniaxial loading were studied on the basis of nonlinear theory and damage mechanics in this paper. According to the definition of damage strain of rocks, a damage strain method by which the damage variable was defined was suggested to establish...