西南交通大学学报2025，Vol.60Issue(3)：656-664,9.DOI:10.3969/j.issn.0258-2724.20230231
应力-剪胀关系比较与岩石应力-剪胀关系研究
Comparison of Stress-Dilatancy Rules and Research on Stress-Dilatancy Rule for Rocks
摘要
Abstract
In order to evaluate the prediction accuracy of typical stress-dilatancy rules on the mechanical response of common geomaterials,propose a stress-dilatancy rule suitable for rocks,and improve the accuracy of constitutive models,typical stress-dilatancy rules were compared with experimental data to propose a stress-dilatancy model suitable for rocks.Firstly,based on the thermodynamic framework and the energy conservation equation,three typical stress-dilatancy models were sorted out,and the stress-dilatancy data of various geomaterials were compared with those typical stress-dilatancy rules.Then,by taking the Rowe dilatancy model as the basic framework and considering the influence of various factors,an improved Rowe stress-dilatancy model suitable for rocks was proposed,and its fintness on the experimental data was analyzed.The fitness of the proposed model and the variable dilatancy angle model on the evolution of dilatancy angle during loading was compared.Finally,the modified Rowe dilatancy rule was coupled with the modified Cam-clay model,and the simulation results and test data of the classical modified Cam-clay model were compared and verified.The results show that the classical stress-dilatancy rule based on the pure friction hypothesis cannot accurately describe the stress-dilatancy response of geomaterials with cohesion due to the influence of cohesion.The modified Rowe dilatancy model can effectively reflect the stress-dilatancy response of rock and simulate the"turning hook"phenomenon in the data.Furthermore,the proposed stress-dilatancy model is not only simple in form but also has fewer parameters than the mobilizing dilatant angle models.The proposed modified Rowe dilatancy model can improve the accuracy of the constitutive model in deformation prediction.关键词
应力-剪胀关系/岩石/黏聚力/剪胀角/模型Key words
stress-dilatancy rule/rocks/cohesive force/dilatancy angle/models分类
天文与地球科学引用本文复制引用
梁基冠,黄林冲,马建军,陈万祥..应力-剪胀关系比较与岩石应力-剪胀关系研究[J].西南交通大学学报,2025,60(3):656-664,9.基金项目
国家自然科学基金项目(51978677,52278422) （51978677,52278422）
基础科研项目(JCKY2020110C096)感谢深圳市科创委可持续发展计划专项(KCXFZ202002011008532,KCXFZ20201221173207020)对本研究的资助 （JCKY2020110C096）
感谢Katarzyna Dołzyk-Szypcio博士和杨宏伟副教授关于数据处理的建议. （）
