Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
This study applies an improved Harris distribution function to describe rock material heterogeneity and randomness of micro-unit damage to determine the rock damage evolution law. A new damage constitutive model is established using the dimensionless Drucker-Prager (D-P) criterion to reasonably measure the strength of rock micro-units, from which we deduce a theoretical expression of the model parameters and discuss their physical meaning. We performed triaxial compression tests on sandstone samples under conventional conditions to validate our model. The results show that the improved Harris distribution function is suitable for describing the damage evolution process of rock material, and its meso-mechanical response is consistent with the macroscopic rock deformation and failure process. The dimensionless D-P criterion is used to define the random variables of the rock micro-unit strength, which reduces the number of independent model parameters and simplifies the parameter determination process and model expression.
This study applies an improved Harris distribution function to describe rock material heterogeneity and randomness of micro-unit damage to determine the rock damage evolution law. A new damage constitutive model is established using the dimensionless Drucker-Prager (D-P) criterion to reasonably measure the strength of rock micro-units, from which we deduce a theoretical expression of the model parameters and discuss their physical meaning. We performed triaxial compression tests on sandstone samples under conventional conditions to validate our model. The results show that the improved Harris distribution function is suitable for describing the damage evolution process of rock material, and its meso-mechanical response is consistent with the macroscopic rock deformation and failure process. The dimensionless D-P criterion is used to define the random variables of the rock micro-unit strength, which reduces the number of independent model parameters and simplifies the parameter determination process and model expression.
A Dimensionless Rock Damage Constitutive Model under an Improved Harris Distribution
Soil Mech Found Eng
Soil Mechanics and Foundation Engineering ; 59 ; 338-346
01.09.2022
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
A Dimensionless Rock Damage Constitutive Model under an Improved Harris Distribution
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