Rheological model of expansion rock considering humidity effect
Abstract：The differential viscoelastic plasticity constitutive equation with the creational rheological elements in humidity field of rock which considers the influence of humidity was finished based on the Nishihara rheological model.The model equation considering humidity effect of creep,unloading and relaxation were deduced.When the stress is less than yield stress,the model is a stable creep model;and the unloading curve contains instantaneous elasticity,elastic after-effect and viscosity flow induced by humidity.When the stress is greater than yield stress,the model is an unstable creep：and the curve of unloading includes instantaneous elasticity,elastic after-effect and the viscosity flow induces by the stress and humidity.The multiaxial creep equation was also established according to equivalent effective strain and stress theory.This model reflects the rheological properties of rock,and can be used for analysis of stability of rocks.
Keywords：humidity effectexpansion rockrheologicalcreepunloadingmul-tiaxial creep
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 396-401 )