| 岩盐弹塑性损伤耦合模型研究 |
| |
| 引用本文： | 房敬年,周辉,胡大伟,邵建富,梁玉雷.岩盐弹塑性损伤耦合模型研究[J].岩土力学,2011,32(2):363-368. |
| |
| 作者姓名： | 房敬年 周辉 胡大伟 邵建富 梁玉雷 |
| |
| 作者单位： | 1.中国科学院武汉岩土力学研究所 岩土力学国家重点实验室，武汉 430071；2.法国里尔科技大学 里尔力学实验室，法国 里尔 59655 |
| |
| 基金项目： | 国家自然科学基金，国家自然科学基金青年基金，中国科学院武汉岩土力学研究所岩土力学国家重点实验室开放基金，三峡大学三峡库区地质灾害教育部重点实验室开放基金 |
| |
| 摘 要： | 岩盐力学模型是进行能源岩盐储存工程稳定性分析的基础，而损伤和塑性机制并存且相互耦合是岩盐力学行为的基本特点。采用云应岩盐，进行了多组围压条件下的三轴压缩试验，分析了不同围压下岩盐的变形特征。在试验分析的基础上，提出了一种能够描述岩盐特性的弹塑性损伤耦合的模型，该模型描述了岩盐损伤的演化和塑性变形的耦合关系，并引入了一种非关联的塑性流动法则来描述岩盐从塑性体积压缩到膨胀的转化。采用该模型对在三轴压缩下的岩盐应力-应变关系进行了模拟分析，并与试验数据进行了对比，结果表明该模型能够较好地描述岩盐的主要力学和变形特性。
|
| 关 键 词： | 岩盐 力学模型 弹塑性损伤耦合 |
| 收稿时间： | 2009-06-25 |
Coupled elastoplastic-damage model for salt rock |
| |
| FANG Jing-nian,ZHOU Hui,HU Da-wei,SHAO Jian-fu,LIANG Yu-lei.Coupled elastoplastic-damage model for salt rock[J].Rock and Soil Mechanics,2011,32(2):363-368. |
| |
| Authors: | FANG Jing-nian ZHOU Hui HU Da-wei SHAO Jian-fu LIANG Yu-lei |
| |
| Institution: | 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Laboratory of Mechanics of LILLE, UMR 8107 CNRS, EUDIL-USTL, Polytech-Lille, 59655 Villeneuve d’Ascq, France |
| |
| Abstract: | Mechanical model is the basis for analysis of energy deposit engineering stability in salt seam; and the coupled damage and plasticity mechanism is the basic mechanical behavior of rock salt. Using rock salt from Yun-Ying, triaxial compression tests are performed under different confining pressures; and the deformation characteristics of salt rock are analyzed. Based on a brief account of experimental investigation, a coupled elastoplastic-damage model for salt rock is proposed. The model can describe the coupled relations between plastic deformation and damage evolution; and also a non-associated rule is preferred in order to describe a transition of plastic volumetric strain from compressibility to dilatancy. A simulation case is conducted to investigate the deformation processes of salt rock under triaxial compression; and the results show that the numerical simulations perfectly agree with the experimental data; so it is shown that the proposed coupled elastoplastic damage model is able to describe the main mechanical and deformation properties of salt rock. |
| |
| Keywords: | salt rock mechanical model elastoplastic damage coupling |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
