A new discussion on damage softening statistical constitutive model for rocks and method for determining its parameters

CAO Wen-gui; LI Xiang

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A new discussion on damage softening statistical constitutive model for rocks and method for determining its parameters

更新时间：2026-06-25

- A new discussion on damage softening statistical constitutive model for rocks and method for determining its parameters
- Vol. 29, Issue 11, (2008)
- 作者机构：
  
  湖南大学岩土工程研究所,长沙,410082
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU452
- Online First：07 August 2013，
  
  Published：2008
- 稿件说明：
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CAO Wen-gui, LI Xiang. A new discussion on damage softening statistical constitutive model for rocks and method for determining its parameters[J]. 2008, 29(11).
DOI：

CAO Wen-gui, LI Xiang. A new discussion on damage softening statistical constitutive model for rocks and method for determining its parameters[J]. 2008, 29(11). DOI：

摘要

基于现有岩石损伤软化统计本构模型研究，通过探讨岩石损伤软化统计本构模型参数与岩石应力-应变全程曲线特征参数即峰值应力与应变的关系，建立起特定围压下模型参数与围压的解析表达式。引进岩石Mohr-Coulomb强度准则，建立不同围压下岩石应力-应变全程曲线峰值应力与围压之间的关系，再通过探讨不同岩石应力-应变全程曲线峰值应变与围压的关系，导出了具有普遍意义的不同围压下岩石峰值应变计算公式，从而建立岩石损伤软化统计本构模型参数确定的新方法，由此得到能够模拟不同围压下岩石应变软化全过程的统一损伤软化统计本构模型。该模型较同类模型具有参数少和易于确定等特点，理论计算和实测结果比较分析表明了该方法与模型的合理性。

Abstract

Based on the existing research on damage softening statistical constitutive model for rocks

firstly

the analytical expressions for the model parameters and confining pressure are established for specific confining pressures by discussing the relationship between the model parameters and characteristic parameters (the stress and corresponding strain at the peak point in the complete stress-strain curve). Then

by using the Mohr-Coulomb strength criterion

the relation between the peak stress and confining pressure is developed under different confining pressures. Thirdly

the formula with general significance for the peak strain in different confining pressures is deduced through investigating the correlation between the strain at the peak point and confining pressure for different rocks. Thus

a new method to determine the model parameters is presented

and a unified damage softening statistical constitutive model for rocks which is applicable to different confining pressures is then proposed. This constitutive model has fewer parameters and the method of determining its parameters is also easy. Finally

the rationality of the new method and the proposed model is verified through comparative analysis between the theoretical and experimental results.

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Related Author

CAO Wen-gui

ZHANG Sheng

ZHAO Ming-hua

WEI Li-de

YANG Chun-he

XU Wei-ya

LIU Dong-qiao

WANG Zhuo

Related Institution

Geotechnical Engineering Institute, Hunan University

中科院武汉岩土力学研究所，湖北武汉 430071 2.河海大学岩土工程研究所

State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing)

Chinese Society for Rock Mechanics and Engineering

School of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing)

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