EXPERIMENTAL RESEARCH ON DEFORMATION AND STRENGTH CHARACTERISTICS IN PROCESS OF BRAZILIAN SPLIT FATIGUE FAILURE OF SANDSTONE
SU Chengdong1，ZHANG Sheng1，TANG Xu2
(1. School of Energy Science and Engineering，Henan Polytechnic University，Jiaozuo，Henan 454000，China；
2. School of Safety Science and Engineering，Henan Polytechnic University，Jiaozuo，Henan 454000，China)
Abstract：The deformation rules and strength characteristics of sandstone samples in the process of Brazilian split fatigue load were studied by the RMT–150B multi-function servo system. The results showed that there were almost same deformation characteristics in both the conventional split test and uniaxial compression test before the peak load，which could also be divided into 4 stages including compression，elasticity，yielding and failure stage. The destroy mode of Brazilian split fatigue was controlled completely by the fracture process curve of the conventional Brazilian split；and the deformation value and upper limit load(stress) were equivalent to the corresponding deformation in the post-peak process curve of the conventional Brazilian split test. The deformation(rate) curve versus time in the process of splitting fatigue test was similar to the creep characteristics curve，which could be divided into 3 stages including initial acceleration，constant velocity and acceleration stage；and the fatigue limit load(stress) ratio and the tensile fatigue strength were negatively correlated with the cycle number. The fatigue upper limit load(stress) was the main control factor impacting the rock fatigue life；and the internal original microcrack distribution of sandstone sample had great influences on the split fatigue life. The increase of the upper fatigue limit load(stress) leaded to reductions in fatigue life；while the tensile deformation basically unchanged.
苏承东1，张 盛1，唐 旭2. 砂岩巴西劈裂疲劳破坏过程中变形与强度特征的试验研究[J]. 岩石力学与工程学报, 2013, 32(1): 41-48.
SU Chengdong1，ZHANG Sheng1，TANG Xu2. EXPERIMENTAL RESEARCH ON DEFORMATION AND STRENGTH CHARACTERISTICS IN PROCESS OF BRAZILIAN SPLIT FATIGUE FAILURE OF SANDSTONE. , 2013, 32(1): 41-48.
[1] 肖建清，丁德馨，徐 根，等. 常幅循环荷载下岩石的变形特性[J]. 中南大学学报：自然科学版，2010，41(2)：685–691.(XIAO Jianqing，DING Dexin，XU Gen，et al. Deformation characteristics of rock under constant amplitude cyclic loading[J]. Journal of Central South University：Science and Technology，2010，41(2)：685–691.(in Chinese))
[2] 杨永杰，宋 扬，楚 俊. 循环荷载作用下煤岩强度及变形特征试验研究[J]. 岩石力学与工程学报，2007，26(1)：201–205.(YANG Yongjie，SONG Yang，CHU Jun. Experimental study on characteristics of strength and deformation of coal under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2007，26(1)：201–205.(in Chinese))
[3] 徐建光，张 平，李 宁. 循环荷载下断续裂隙岩体的变形特性[J]. 岩土工程学报，2008，30(2)：802–806.(XU Jianguan，ZHANG Ping，LI Ning. Deformation properties of rock mass with intermittent cracks under cyclic loading[J]. Chinese Journal of Geotechnical Engineering，2008，30(2)：802–806.(in Chinese))
[4] 葛修润，蒋 宇，卢允德，等. 周期荷载作用下岩石疲劳变形特性试验研究[J]. 岩石力学与工程学报，2003，22(10)：1 581–1 585.(GE Xiurun，JIANG Yu，LU Yunde，et al. Testing study on fatigue deformation law of rock under cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2003，22(10)：1 581–1 585.(in Chinese))
[5] 章清叙，葛修润，黄 铭，等. 周期荷载作用下红砂岩三轴疲劳变形特性试验研究[J]. 岩石力学与工程学报，2006，25(3)：473–478. (ZHANG Qingxu，GE Xiurun，HUANG Ming，et al. Testing study on fatigue deform action law of red-sandstone under triaxial compression with cyclic loading[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(3)：473–478.(in Chinese))
[6] 葛修润，卢应发. 循环荷载作用下岩石疲劳破坏和不可逆变形问题的探讨[J]. 岩土工程学报，1992，14(3)：56–60.(GE Xiurun， LU Yingfa. Study on fatigue failure and irreversible deformation of rock under cyclic loading[J]. Chinese Journal of Geotechnical Engineering，1992，14(3)：56–60.(in Chinese))
[7] 任建喜，蒋 宇，葛修润. 单轴压缩岩石疲劳寿命影响因素试验分析[J]. 岩土工程学报，2005，27(11)：1 282–1 285.(REN Jianxi，JIANG Yu，GE Xiurun. Test and analysis on rock fatigue life due to affecting factors under uniaxial compression[J]. Chinese Journal of Geotechnical Engineering，2005，27(11)：1 282–1 285.(in Chinese))
[8] 葛修润. 周期荷载下岩石大型三轴试件的变形和强度特性研究[J].岩土力学，1987，8(2)：11–19.(GE Xiurun. Study on deformation and strength characteristics of large-scale triaxial test sample of rock under cyclic loading[J]. Rock and Soil Mechanics，1987，8(2)：11–19.(in Chinese))
[9] 林卓英，吴玉山. 岩石在循环荷载作用下的强度及变形特性[J]. 岩土力学，1987，8(3)：31–37.(LIN Zhuoying，WU Yushan. Rock?s characteristics of strength and deformation under cyclic loads[J]. Rock and Soil Mechanics，1987，8(3)：31–37.(in Chinese))
[10] 许 江，杨秀贵，王 鸿，等. 周期性载荷作用下岩石滞回曲线的演化规律[J]. 西南交通大学学报，2005，40(6)：754–758.(XU Jiang，YANG Xiugui，WANG Hong，et al. Evolution law of hysteresis curve of rock under cyclic loading[J]. Journal of Southwest Jiaotong University，2005，40(6)：754–758.(in Chinese))
[11] 徐 根，陈 枫，肖建清. 中等应变速率下岩石抗拉强度实验研究[J]. 土工基础，2005，19(4)：51–53.(XU Gen，CHEN Feng，XIAO Jianqing. Experimental study of rock tensile strength under intermediate strain rate[J]. Soil Engineering and Foundation，2005，19(4)：51–53.(in Chinese))
[12] 王 瑶，吴胜兴，周继凯，等. 花冈石动态轴向拉伸力学性能试验研究[J]. 岩石力学与工程学报，2010，29(11)：2 328–2 336.(WANG Yao，WU Shengxing，ZHOU Jikai，et al. Experimental study of dynamic axial tensile mechanical of properties of granite[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(11)：2 328– 2 336.(in Chinese))
[13] 余贤斌，谢 强，李心一，等. 岩石直接拉伸与压缩变形的循环加载实验与双模量本构模型[J]. 岩土工程学报，2005，27(9)：988–993.(YU Xianbin，XIE Qiang，LI Xinyi，et al. Cycle loading tests of rock samples under direct tension and compression and bi-modular constitutive model[J]. Chinese Journal of Geotechnical Engineering，2005，27(9)：988–993.(in Chinese))
[14] 中华人民共和国国家标准编写组. GB/T23561—2009 煤和岩石物理力学性质测定方法[S]. 北京：中国标准出版社，2009.(The National Standards Compilation Group of People?s Republic of China. GB/T23561—2009 Methods for determining the physical and mechanical properties of coal and rock[S]. Beijing：Standards Press of China，2009.(in Chinese))
2013, Vol. 32 
