Damage evolution study of sandstone by cyclic uniaxial test and digital image correlation
Damage evolution study of sandstone by cyclic uniaxial test and digital image correlation
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循环单轴试验与数字图像相关研究砂岩损伤演化
DOI：
10.1016/j.tecto.2013.06.007
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发表时间：
2013-11
期刊：
影响因子：
2.9
通讯作者：
Qu, Chuanyong
中科院分区：
文献类型：
--
作者：
Kang, Yilan;Huang, Ganyun;Fu, Donghui;Qu, Chuanyong
研究了循环单轴压缩下岩石的损伤演化过程和裂纹发展过程。在这项工作中，对受到不同振幅的轴向循环加载的砂岩样品进行了测试，并提供了加载-卸载期间样品表面的光学图像以进行数字图像相关（DIC）分析。然后将获得的实验结果用于通过 DIC 方法确定砂岩的表观应变。表观应变依次用于描述损伤演化、裂纹成核和扩展直到失效的过程。轴向载荷-位移曲线表明，随着循环次数的增加，残余位移略有增加，并且耗散能在第一个循环后迅速下降，然后趋于保持恒定。从全场视应变发现，当循环载荷幅值超过一定值时，循环次数对表观应变局部化和损伤演化有显着影响。
The damage evolution process and crack development of rocks under cyclic uniaxial compression were studied. In this work, sandstone samples subjected to axially cyclic loading with different amplitudes were tested and optical images of specimen surface in loading–unloading periods are presented for digital image correlation (DIC) analysis. The experimental results obtained are then used to determine apparent strains of the sandstones by means of DIC approach. The apparent strains are in turn employed to describe the process of damage evolution, crack nucleation and propagation until failure. Axial load–displacement curves show that the residual displacement increases slightly with an increase in cycles and the dissipated energy decreases rapidly after the first cycle then tends to remain constant. It is found from the full-field apparent strains that when the amplitude of the cyclic load exceeds a certain value, the value of cycles has a significant effect on the apparent strain localization and damage evolution.
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DOI：
10.1016/s0148-9062(99)00016-9
发表时间：
1999-06-01
影响因子：
7.2
作者：
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通讯作者：
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DOI：
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发表时间：
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影响因子：
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影响因子：
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发表时间：
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影响因子：
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影响因子：
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通讯作者：
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