(长沙交通学院岩土研究所, 长沙 410076中南工业大学资源、 环境与建筑工程学院, 长沙 410083
)
摘 要: 针对纯剪断裂试件存在的问题, 提出了采用压剪试件实现岩石Ⅱ型裂纹剪切断裂并测试岩石剪切断裂韧度的实验方法, 并通过对压剪试件的应力分布和测试结果的分析讨论, 提出了岩石Ⅱ型断裂韧度实验的最佳方案, 并进而讨论了Ⅱ型裂纹的两种不同断裂型式和断裂判据。
关键字: 剪切断裂 断裂韧度 实验方法
ROCK FRACTURE TOUGHNESS
(Institute of Geotechnics Engineering, Changsha Communications University,ª¤Changsha 410076, P. R. China
College of Resources, Environment and Civil Engineering,ª¤
Central South University of Technology, Changsha 410083, P. R. China
)
Abstract:In view of the problem existed in pure shear fracture specimen, the experimental method has been investigated, which is used to cause mode ¢ò fracture and to measure mode ¢òfracture toughness. Meanwhile, the two different modes of fracture behavior and fracture criteria for mode ¢ò crack were discussed.
Key words: shear fracture fracture toughness experimental method