Energy and Fatigue Damage Evolution of Sandstone under Different Cyclic Loading Frequencies

<div>Variation of loading and unloading moduli of sandstone specimens under loading cycles with different frequencies. (a) Loading modulus. (b) Unloading modulus.</div>

Shock and Vibration

fig7

Figure 7

Figure 7: Energy and Fatigue Damage Evolution of Sandstone under Different Cyclic Loading Frequencies 