(長沙交通學院巖土研究所， 長沙 410076中南工業(yè)大學資源、 環(huán)境與建筑工程學院， 長沙 410083
)
摘 要: 針對純剪斷裂試件存在的問題， 提出了采用壓剪試件實現(xiàn)巖石Ⅱ型裂紋剪切斷裂并測試巖石剪切斷裂韌度的實驗方法， 并通過對壓剪試件的應力分布和測試結果的分析討論， 提出了巖石Ⅱ型斷裂韌度實驗的最佳方案， 并進而討論了Ⅱ型裂紋的兩種不同斷裂型式和斷裂判據(jù)。
關鍵字: 剪切斷裂 斷裂韌度 實驗方法
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
