单轴压缩岩石疲劳寿命影响因素试验分析

单轴压缩岩石疲劳寿命影响因素试验分析 English Version

基金项目: 国家自然科学基金资助项目(10202019);;国家自然科学基金资助项目(10172057);;陕西省教育厅自然科学专项基金资助项目(02JK126);;陕西省教育厅自然科学专项基金资助项目(04JK222)

1.School of Architecture and Civil Engineering Xi’an University of Science and Technology Xi’an 710054 China 2.Institute of Rock Mechanics and Engineering Shanghai Jiaotong University Shanghai 200030 China

摘要: 利用RMT150B型岩石力学多功能试验机对单轴压缩岩石疲劳寿命的影响因素进行了研究。重点分析了应力幅值、波形、频率等因素对岩石疲劳破坏寿命的影响规律。结果表明,应力幅值、波形和频率都对岩石的疲劳寿命有显著的影响。幅值和波形影响的实质是能量耗散的不同,而频率影响疲劳寿命的实质在于加载速率的不同。
- 岩石 /
- 单轴压缩 /
- 疲劳寿命 /
- 周期载荷 /
- 影响因素
Abstract: Using the multi-function testing machine named RMT150B,the fatigue life of rock due to different affecting factors under uniaxial compression condition were studied.It was emphasized that the fatigue life of rock sample was influenced by stress amplitudes,waveforms and frequencies.The essential reason of influence of stress amplitudes and waveforms on rock life was different dissipation of energy.And the essential reason of influence of different frequencies on rock life was different rate of loading.
- rock /
- uniaxial compression /
- fatigue life /
- cyclic loading /
- affecting factors