| 冯春林,冯超博,吴永丰,冯福贤.循环荷载下岩石疲劳寿命双因素模型实验研究[J].南华大学学报(自然科学版),2010,24(4):36~41.[FENG Chun-lin1,FENG Chao-bo2,WU Yong-feng3,FENG Fu-xian1.Experimental Study of Dual Factor Model of Fatigue Life of Rock Subjected to Cyclic Loading[J].Journal of University of South China(Science and Technology),2010,24(4):36~41.] |
| 循环荷载下岩石疲劳寿命双因素模型实验研究 |
| Experimental Study of Dual Factor Model of Fatigue Life of Rock Subjected to Cyclic Loading |
| 投稿时间：2010-10-22 |
| DOI： |
| 中文关键词: 岩石 循环荷载 疲劳寿命 双因素模型 稳态 非稳态 |
| 英文关键词:rock cyclic loading fatigue life dual factors model steady unsteady |
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| 中文摘要: |
| 通过对花岗岩、白砂岩和大理岩的单轴压缩、恒幅和变幅循环荷载疲劳试验,建立了一种测定岩石疲劳寿命双因素实验模型.试验表明,变幅应力是影响疲劳寿命的关键因素;变幅应力的基础疲劳寿命比恒幅应力的降低16.9%～18%,临界应力比降低23.0%～28.23%.尽管岩石的试验数据离散性很大,但本实验模型对于测定岩石全应力曲线非稳态区内的疲劳寿命具有良好的适应性;与传统方法相比,它更准确,更符合实际;因此该模型对岩石基础工程的设计和现场监测具有实用价值. |
| 英文摘要: |
| A dual factor experimental model of determining the fatigue life of rock was set up by the testing results of uniaxial compression,constant and variable cyclic loading of granite,white sandstone and marble.The testing results showed that variable amplitude stress was the key factor affecting the fatigue life.Its basic fatigue life was 16.9% to 18% lower than that of constant amplitude stress and its critical stress ratios decreased by 23.0% to 28.23%.In spite of a wide discreteness of test data of rock,the experimental model has had a good adaptability with determining the rock’s fatigue life in the unsteady zone of complete stress-strain curve.The test model was even more exact,more corresponding to facts,than the tradition model.It would have practical value for the design and the assessment of long-term stability in the rock base engineering. |
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