全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

循环加卸载下饱和岩石变形破坏的损伤与能量分析

DOI: 10.3969/j.issn.1005-3026.2014.06.024, PP. 867-870

Keywords: 单轴压缩,循环加卸载,饱和岩石,损伤,能量耗散

Full-Text   Cite this paper   Add to My Lib

Abstract:

以中关铁矿深部饱水闪长岩单轴循环加卸载的室内力学试验结果为基础,结合线弹性损伤力学理论,针对饱和岩石在单轴循环加卸载作用下的变形、损伤及能耗特性进行了研究.结果表明:每一级加载与卸载过程的应力-应变曲线均呈内凹形,随着循环次数及应力水平的增加,塑性滞回曲线向应变增大的方向移动,且应变中不可恢复的变形逐渐减小;轴向应变、横向应变和体应变的绝对损伤参数与累积损伤参数均随循环次数及应力水平的增大而增大,且三者的变化趋势基本一致;能量耗散值与循环的次数近似呈线性关系,后一循环的能耗不等于前几次循环能耗之和.

References

[1]  Lu Y F,Shao J F.Modeling of anisotropic damage in brittle rocks under compression dominated stress[J].International Journal for Numerical and Analytical Methods in Geomechanics,2002,26(10):945/961.
[2]  Shao J F,Lu Y F,Dariusz L.Damage modeling of saturated rocks in drained and undrained condition[J].Journal of Engineering Mechanics,2004,130(6):733/740.
[3]  Jing H W,Zhang Z Y,Xu G A.Study of electromagnetic and acoustic emission in creep experments of wantecontaining rock samples[J].Journal of China University of Mining & Technology,2008,18(1):42/45.
[4]  Chang C D,Haimson B.Effect of fluid pressure on rock compressive failure in a nearly impermeable crystalline rock:implication on mechanism of borehole breakouts[J].Engineering Geology,2007,89:230/242.
[5]  Eberhardt E,Stead D,Stimpson B.Quantifying progressive prepeak brittle fracture damage in rock during uniaxial compression[J].International Journal of Rock Mechanics & Mining Sciences,1999,36:361/380.
[6]  Eberheardt E,Stead D,Stimpson B,et al.Identifying crack initiation and propagation thresholds in brittle rock[J].Canadian Geotechnical Journal,1998,35(2):222/233.
[7]  谢和平,鞠杨,黎立云.基于能量耗散与释放原理的岩石强度与整体破坏准则[J].岩石力学与工程学报,2005,24(7):3003/3010.(Xie Heping,Ju Yang,Li Liyun.Criteria for strength and structural failure of rocks based on energy dissipation and energy release principles[J].Chinese Journal of Rock Mechanics and Engineering,2005,24(7):3003/3010.)
[8]  赵闯,武科,李术才,等.循环荷载作用下岩石损伤变形与能量特征分析[J].岩土工程学报,2013,35(5):890/896.(Zhao Chuang,Wu Ke,Li Shucai,et al.Energy characteristics and damage deformation of rock subjected to cyclic loading[J].Chinese Journal of Geotechnical Engineering,2013,35(5):890/896.)
[9]  Song D Z,Wang E Y,Liu J.Relationship between EMR and dissipated energy of coal rock mass during cyclic loading process[J].Safety Science,2012,50:751/760.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133