Paper Title:

The Anisotropy Characteristic of Rock Material Described by the Stress Softening Criterion in Civil Engineering

Periodical Advanced Materials Research (Volume 568)
Main Theme Advanced Research on Civil Engineering and Material Engineering
Chapter Chapter 2: Mechanics Research in Civil Engineering and Material Engineering
Edited by Helen Zhang, David Jin and X.J. Zhao
Pages 226-229
DOI 10.4028/www.scientific.net/AMR.568.226
Citation Hai Bo Zhang et al., 2012, Advanced Materials Research, 568, 226
Online since September 2012
Authors Hai Bo Zhang, Qun Yi Liu
Keywords Anisotropy Characteristic, Civil Engineering, Rock Material, Softening Behavior, Stress
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In this paper, firstly we utilize the elastic model, which provides the simplest representation of material behavior in civil engineering. This model is valid for homogeneous, isotropic, continuous materials that exhibit linear stress-strain behavior with no hysteresis on unloading. The elastic models include both isotropic and anisotropic elastic models. Then the Mohr-Coulomb model is used which can represent shear failure in soils and rocks in civil engineering and geotechnical engineering. After that, the strain- softening model is founded, which allows representation of nonlinear material softening and hardening behavior based on prescribed variations of the Mohr-Coulomb model properties (cohesion, friction, dilation, tensile strength) as functions of the deviatoric plastic strain. Finally, a case study is done for the stratified rock mass, the elastic modulus of the rock sample for different surrounding compressive are obtained, to exhibit the anisotropy characteristic of this type of rock material

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