Fatigue Characteristics of Limestone under Triaxial Compression with Cyclic Loading

Figure 8

Comparison of deviatoric stress-strain hysteresis loops of limestone sample SA. 6 in different phases of fatigue failure at the failure stress level: (a) axial, (b) circumferential, and (c) volumetric hysteresis loops for cycles 2 to 6; (d) axial, (e) circumferential, and (f) volumetric hysteresis loops for cycles 199 to 203; and (g) axial, (h) circumferential, and (i) volumetric hysteresis loops for the last five cycles before failure.

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