A continuum model of jointed rock masses based on micromechanics and its integration algorithm

The paper is devoted to proposing a constitutive model based on micromechanics. The joints in rock masses are treated as penny-shaped inclusion in solid but not through structural planes by considering joint density, closure effect, joint geometry. The mechanical behavior of the joints is represente...

Full description

Saved in:

Bibliographic Details
Published in:	Science China Technological Sciences Vol. 54; no. 3; pp. 581 - 590
Main Authors:	Zhu, FuWei, Dui, GuanSuo, Ren, QingWen
Format:	Journal Article
Language:	English
Published:	Heidelberg SP Science China Press 01.03.2011
Subjects:	Engineering constitutive integration algorithms Mori-Tanaka joint rock masses ABAQUS consistent tangent moduli micromechanics
ISSN:	1674-7321, 1862-281X
Online Access:	Get full text
Tags:	Add Tag No Tags, Be the first to tag this record!

Description
Summary:	The paper is devoted to proposing a constitutive model based on micromechanics. The joints in rock masses are treated as penny-shaped inclusion in solid but not through structural planes by considering joint density, closure effect, joint geometry. The mechanical behavior of the joints is represented by an elasto-plastic constitutive law. Mori-Tanaka method is used to derive the relationship between the joint deformations and macroscopic strains. The incremental stress-strain relationship of rock masses is formulated by taking the volume average of the representative volume element. Meanwhile, the behavior of joints is obtained. By using implicit integration algorithms, the consistent tangent moduli are proposed and the method of updating stresses and joint displacements is presented. Some examples are calculated by ABAQUS user defined material subroutine based on this model.
ISSN:	1674-7321 1862-281X
DOI:	10.1007/s11431-011-4289-0