宿州学院学报2026，Vol.41Issue(3)：37-45,9.DOI:10.3969/j.issn.1673-2006.2026.03.007
常规三轴压缩条件下岩石本构模型
Conventional Three-Axis Compression Rock Constitutive Model
摘要
Abstract
Based on the analysis of the internal structural characteristics of rock materials,the mechanism by which rock materials resist external stress can be divided into two parts:elastic stress and frictional stress.The shear stress has a quartic function relationship with shear strain.When neglecting the nonlinearity of material elasticity and fric-tional stress,this model can be simplified as Hooke's law.There is a critical value for the initial compression effect of rocks,and when the confining pressure exceeds the critical value,the initial compaction effect of the rock disap-pears.Based on this,a critical state equation is proposed.Volume strain can be decomposed into the sum of the vol-ume strain term caused solely by shear stress and the volume strain term caused solely by average volume stress.The model is validated using conventional triaxial compression test data for six different types of rocks from published lit-erature.The results show that the model can effectively describe the mechanical behavior of rocks under different stress conditions,demonstrating its rationality and applicability.关键词
本构方程/胡克定律/弹性应力/摩擦应力/压密效应/临界状态方程Key words
constitutive equation/Hooke's law/elastic stress/frictional stress/compaction effect/critical state equa-tion分类
矿业与冶金引用本文复制引用
黄家军,刘发明..常规三轴压缩条件下岩石本构模型[J].宿州学院学报,2026,41(3):37-45,9.基金项目
非财政资金横向项目(2023xhx320) （2023xhx320）
宿州学院重点建设课程项目(szxy2018zdkc24) （szxy2018zdkc24）
安徽省质量工程项目大学生创客试验室(2016ckjh200). （2016ckjh200）
