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Creep fracture of sandstones
Authors:YL Chen  R Azzam  
Institution:aDepartment of Civil Engineering, University of Shanghai for Science and Technology, 516 Jungong Road, 200093 Shanghai, PR China;bDepartment of Civil Engineering, Shanghai University, 149 Yanchang Road, 200072 Shanghai, PR China;cDepartment of Engineering Geology and Hydrogeology, RWTH Aachen University, Germany
Abstract:Creep is one of the important properties of rocks and rock masses. But the mechanism and characteristic of rocks in creep has not received the attention it deserves. Sandstones mined from Emei Mountain are investigated and tested by utilizing the three-point bending creep fracture test. A mathematical relation between stress intensity factors and durations of sustained loading for the above specimen is obtained based on the gray prediction theory. The obtained results provide a better understanding of rock fracture under creep.
Keywords:Sandstone  Creep  Fracture  Three-point bending test  Gray prediction theory
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