Test of subcritical crack growth and fracture toughness under water-rock interaction in three types of rocks
Test of subcritical crack growth and fracture toughness under water-rock interaction in three types of rocks
复制标题
三类岩石水岩相互作用下亚临界裂纹扩展及断裂韧性试验
DOI：
10.1007/s11771-015-2568-9
复制
发表时间：
2015-02
影响因子：
4.4
通讯作者：
Liao Jun
中科院分区：
文献类型：
--
作者：
Hao Rui-qing;Li Jiang-teng;Cao Ping;Liu Bo;Liao Jun
采用双扭转试验研究了橄榄岩、二辉橄榄岩和角闪岩的亚临界裂纹扩展和断裂韧性。结果表明，水岩相互作用对亚临界裂纹扩展有显着影响。随着水-岩相互作用，裂纹速度增大，而应力强度因子下降，说明水-岩相互作用会降低岩石强度，加速亚临界裂纹扩展。基于Charlse理论和Hilling & Charlse理论，对试验数据进行回归分析，相关系数均大于0.7，相关性显着。这说明两种理论都可以很好地解释测试结果。因此，认为亚临界裂纹扩展归因于化学键的断裂，这是由拉应力以及裂纹尖端材料与腐蚀剂之间的化学反应共同作用引起的。同时，水岩相互作用对断裂韧性也有重要影响。大气环境下样品的断裂韧性高于水中样品的断裂韧性。水岩相互作用对角闪岩断裂韧性的影响大于橄榄岩和二辉橄榄岩。
The subcritical crack growth and fracture toughness in peridotite, lherzolite and amphibolite were investigated with double torsion test. The results show that water-rock interaction has a significant influence on subcritical crack growth. With water-rock interaction, the crack velocity increases, while the stress intensity factor declines, which illustrates that water-rock interaction can decrease the strength of rocks and accelerate the subcritical crack growth. Based on Charlse theory and Hilling & Charlse theory, the test data were analyzed by regression and the correlation coefficients were all higher than 0.7, which shows the correlation is significant. This illustrates that both theories can explain the results of tests very well. Therefore, it is believed that the subcritical crack growth attributes to the breaking of chemical bond, which is caused by the combined effect of the tensile stress and the chemical reaction between the material at crack tip and the corrosive agent. Meanwhile, water-rock interaction has a vital effect on fracture toughness. The fracture toughness of samples under atmospheric environment is higher than that of samples immersed in water. And water-rock interaction has larger influence on fracture toughness in amphibolite than that in peridotite and lherzolite.
登录
查看更多内容
影响因子：
3.9
作者：
K. McKinney;H. L. Smith
通讯作者：
K. McKinney;H. L. Smith
DOI：
10.1016/j.ijrmms.2005.02.001
发表时间：
2005-06
影响因子：
7.2
作者：
Y. Nara;K. Kaneko
通讯作者：
Y. Nara;K. Kaneko
影响因子：
2.8
作者：
P. Meredith;B. Atkinson
通讯作者：
P. Meredith;B. Atkinson
DOI：
10.1016/j.ijsolstr.2012.05.009
发表时间：
2012-09
影响因子：
3.6
作者：
Y. Nara;K. Morimoto;N. Hiroyoshi;T. Yoneda;K. Kaneko;P. Benson
通讯作者：
Y. Nara;K. Morimoto;N. Hiroyoshi;T. Yoneda;K. Kaneko;P. Benson
影响因子：
2.9
作者：
F. Rostom;A. Røyne;D. Dysthe;François Renard
通讯作者：
F. Rostom;A. Røyne;D. Dysthe;François Renard