Rock Damage Constitutive Equation Based on Weibull Distribution of Intensity
the evolution of rock microdefect is a random variation, and we can consider evolutionary process of microdefect system as nonequilibrium statistic processes. The microbit’s intensity distribution obey Weibull distribution, therefore, this paper adopts Druckr-Prager yield criterion, establishes the damage evolution equation using strain as characteristic parameter under the uniaxial stress, and derives relevant damage constitutive equation. Experiments prove that this equation, to some extent, reflect damage evolution processes under the uniaxial stress.
X. W. Li et al., "Rock Damage Constitutive Equation Based on Weibull Distribution of Intensity", Applied Mechanics and Materials, Vols. 90-93, pp. 565-569, 2011