An experimental study and analysis of the behaviour of rock under cyclic loading

Fatigue properties of intact sandstone samples subjected to dynamic uniaxial cyclical loading

“…Zhenyu and Haihong [9] studied the behaviour of rocks under cyclic loading and made the following conclusions:…”

“…Hardy and Chugh [5], Haimson and Kim [6], Attewell and Farmer [7] and others [8][9][10][11][12][13][14][15][16] performed many tests on a variety of rock types, which clearly demonstrated the progressive weakening of rock due to cyclic loading. A summary of work related to fatigue behaviour studied on various intact as well as jointed rock samples by different researchers in the laboratory is provided in Table 1.…”

“…From the reported literature, it was found that intact [3][4][5][6][7][8][9][10][11][12][13][14][15][16] and failed models of jointed rock [17][18][19][20] were extremely susceptible to cyclic fatigue failure. Some have also studied the dynamic damage properties of nonjointed intact samples [21][22][23][24][25].…”

Effects of cyclic loading on the rheological properties of sandstones

“…Almost all research carried out so far has proved that the rheological behaviour of rocks exposed to cyclical loading is similar to the behaviour at static loading. However, at cyclic loading, the rheological properties are more dynamic, the rock failure starts earlier and under lower loading levels [7][8][9][10]. There are various opinions about the cause of this phenomenon.…”

“…Obviously, the evaluation of rheological behavior during cyclic loading is far more complex compared to static loading, because the rock behaviour will be influenced not only by the parameters of cyclic loading but also, according to some authors, for example, [9,16], by the waveform of cyclic loading.…”