Water saturation effects on dynamic fracture behavior of sandstone
Water saturation effects on dynamic fracture behavior of sandstone
复制标题
含水饱和度对砂岩动态断裂行为的影响
DOI：
10.1016/j.ijrmms.2018.12.014
复制
发表时间：
2019-02
影响因子：
7.2
通讯作者：
Haizhi Zang
中科院分区：
文献类型：
--
作者：
Zilong Zhou;Xin Cai;Dan Ma;Xueming Du;Lu Chen;Haiquan Wang;Haizhi Zang
为了了解含水饱和度和加载速率对岩石材料断裂行为的综合影响，采用改进的分离式霍普金森压杆（SHPB）装置，对干砂岩和饱和砂岩试件在大范围加载速率下进行了动态缺口半圆弯曲（NSCB）试验。试验结果表明，在相同加载速率下，饱和试样的动态起裂、扩展韧性和裂纹扩展速度均明显低于干燥试样。上述参数随加载速率的增加而增大。与干燥试样相比，饱和试样的动态起裂、扩展韧性的速率依赖性较高，而裂纹扩展速度的速率依赖性较低。此外，还讨论了不同加载速率下水对断裂行为的双重影响。干燥和饱和试样断裂行为的速率依赖性不同，主要受水的弱化和增强作用的共同作用。基于水力学和线弹性断裂力学（LEFM）的二重性，进一步建立了微观力学模型来解释实验结果。
To understand combined effects of water saturation and loading rate on the fracture behavior of rock materials, dynamic notched semi-circular bending (NSCB) tests were conducted on dry and saturated sandstone specimens under a wide range of loading rates using a modified split Hopkinson pressure bar (SHPB) setup. Test results revealed that, the dynamic fracture initiation, propagation toughness and crack propagation velocity of saturated specimen were apparently lower than that of dry ones at the same loading rate. The above parameters increased with the increase of loading rate. Compared with the dry specimen, the saturated specimen owned a higher rate dependency of the dynamic fracture initiation, propagation toughness and a lower rate dependency of crack propagation velocity. Moreover, dual effects of water on the fracture behavior under different loading rates were discussed. It is believed that the different rate dependencies of fracture behaviors between dry and saturated specimens was governed by the combined weakening and enhancing effects of water. A micro-mechanical model was further developed to explain the experimental results based on the duality of water and linear elastic fracture mechanics (LEFM).
登录
查看更多内容
DOI：
10.1016/s1674-5264(09)60015-6
发表时间：
2009
期刊：
Mining Science and Technology (china)
影响因子：
--
作者：
Ren-shu Yang;Z. Yue;Zhongming Sun;Tongqiang Xiao;D. Guo
通讯作者：
Ren-shu Yang;Z. Yue;Zhongming Sun;Tongqiang Xiao;D. Guo
DOI：
--
发表时间：
1957
期刊：
--
影响因子：
--
作者：
G. Irwin
通讯作者：
G. Irwin
DOI：
10.1016/j.ijrmms.2014.05.015
发表时间：
2014-09-01
影响因子：
7.2
作者：
Song, Dazhao;Wang, Enyuan;Shen, Rongxi
通讯作者：
Shen, Rongxi
DOI：
10.1016/j.ijimpeng.2004.03.005
发表时间：
2004-08-01
影响因子：
5.1
作者：
Field, JE;Walley, SM;Siviour, CR
通讯作者：
Siviour, CR
影响因子：
14
作者：
K. Kvam;T. Dérand;E. Austrheim
通讯作者：
K. Kvam;T. Dérand;E. Austrheim