岩土力学2017，Vol.38Issue(7)：1951-1958,8.DOI:10.16285/j.rsm.2017.07.014
基于声发射特征的盐岩蠕变本构模型研究
Study of creep constitutive model of rock salt based on acoustic emission characteristics
摘要
Abstract
This study aims at investigating the deformation behavior of rock salt as reservoir medium under long-term operation.Uniaxial creep experiments were conducted on rock salt specimens for 359 days,and the law of real-time acoustic emission (AE)signal was also monitored during the test.The results show that three stages of AE were identified in the uniaxial creep experiment.The cumulative AE event location indicates that the distribution of AE signals at each stage corresponds to the positions of deformation and failure of the specimen.Meanwhile,the relationship between accumulative AE event and the creep strain was approximately linear,which proves that the number of AE events can be used to establish the creep constitutive model of rock salt.Hence,a constitutive model of rock salt damage evolution was developed based on AE data.In addition,parameters in the constitutive model were determined by fitting experimental data with the least squares method.Fitting curves show that the proposed creep constitutive model can well describe three creep characteristic stages of rock salt.关键词
蠕变/声发射/损伤/分数阶微分/单轴压缩Key words
creep/acoustic emission/damage/fractional differential/uniaxial compression分类
建筑与水利引用本文复制引用
刘迪,周宏伟,赵阳,段兴,丁靖洋..基于声发射特征的盐岩蠕变本构模型研究[J].岩土力学,2017,38(7):1951-1958,8.基金项目
国家自然科学基金(No.11172318,No.51120145001).This work was supported by the National Natural Science Foundation of China (11172318,51120145001). （No.11172318,No.51120145001）
