| 粉砂质泥岩三轴压缩应力松弛本构模型研究 |
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| 引用本文： | 于怀昌,李亚丽,刘汉东.粉砂质泥岩三轴压缩应力松弛本构模型研究[J].煤炭学报,2011,36(8):1258-1263. |
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| 作者姓名： | 于怀昌 李亚丽 刘汉东 |
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| 作者单位： | 华北水利水电学院 资源与环境学院，河南 郑州 450011 |
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| 基金项目： | 国家自然科学基金资助项目(51004049); 华北水利水电学院高层次人才科研启动项目(201112) |
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| 摘 要： | 采用RLJW-2000型岩石三轴流变伺服仪，在分级加载条件下完成了饱和粉砂质泥岩的三轴压缩应力松弛试验。依据试验结果，分析了岩石应力松弛曲线的特征，表明可以用黏弹性模型来描述粉砂质泥岩的应力松弛特性。分别采用Burgers模型，二单元、四单元以及六单元广义Maxwell模型对各级应变水平下的试验曲线进行辨识研究。依据辨识结果，比较了各模型的优缺点，结果表明：六单元广义Maxwell模型可以准确描述粉砂质泥岩的应力松弛特性；从工程应用角度来讲，采用二单元广义Maxwell模型来描述粉砂质泥岩的应力松弛特性是较适宜的。
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| 关 键 词： | 粉砂质泥岩 应力松弛 黏弹性模型 Burgers模型 广义Maxwell模型 |
| 收稿时间： | 2010-11-25 |
Study of stress relaxation model of silty mudstone under triaxial compression |
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| YU Huai-chang,LI Ya-li,LIU Han-dong.Study of stress relaxation model of silty mudstone under triaxial compression[J].Journal of China Coal Society,2011,36(8):1258-1263. |
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| Authors: | YU Huai-chang LI Ya-li LIU Han-dong |
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| Affiliation: | YU Huai-chang,LI Ya-li,LIU Han-dong(School of Resource and Environment,North China University of Water Conservancy and Hydroelectric Power,Zhengzhou 450011,China) |
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| Abstract: | The stress relaxation test of saturated silty mudstone under triaxial compression was performed with the RLJW-2000 rock servo-controlled rheology testing machine through step loading.By analyzing the characteristics of test curves,it is shown that the viscoelastic model can be used to describe the stress relaxation properties of silty mudstone.Burgers model was firstly selected to identify the stress relaxation of silty mudstone.Then two-element,four-element and six-element generalized Maxwell models were a... |
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| Keywords: | silty mudstone stress relaxation viscoelasticity model Burgers model generalized Maxwell model |
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