A three-dimensional damage-softening statistical constitutive model for rock based on GZZ criterion

Xin Wang, Hehua Zhu, Lianyang Zhang

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Determination of the complete stress–strain characteristics of rock is an essential issue in rock mechanics and plays an important role in solving excavation problems. To reflect the whole damaging process, a three-dimensional damage-softening statistical constitutive model for rock was established based on the Weibull distribution of mesoscopic element strength and by adopting the Generalized Zhang-Zhu (GZZ) criterion as the distribution parameter. The GZZ criterion is a three-dimensional Hoek–Brown strength criterion taking account of the influence of the intermediate principal stress. The results from the model were compared with existing experimental data, indicating that the model is feasible to describe the mechanical behavior of brittle rock. The influence of the Weibull distribution parameters on the constitutive model was studied and the results were generally consistent with physical interpretations of the Weibull parameters. A computer program for this constitutive model was developed, providing an easy way for simulating true triaxial tests under different conditions.

Original languageEnglish (US)
Title of host publicationISRM International Symposium - 10th Asian Rock Mechanics Symposium, ARMS 2018
PublisherInternational Society for Rock Mechanics
ISBN (Electronic)9789811190032
StatePublished - Jan 1 2018
Event10th Asian Rock Mechanics Symposium, ARMS 2018 - Singapore, Singapore
Duration: Oct 29 2018Nov 3 2018

Publication series

NameISRM International Symposium - 10th Asian Rock Mechanics Symposium, ARMS 2018

Conference

Conference10th Asian Rock Mechanics Symposium, ARMS 2018
CountrySingapore
CitySingapore
Period10/29/1811/3/18

Keywords

  • Complete Stress–strain Curve
  • Constitutive Model
  • GZZ Criterion
  • Three-dimensional

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

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