Experimental Study on Initial Damage Point of Deep Granite under Step Cyclic Loading Method

<div>Stress-strain curves in ascending step cyclic loading tests: (a) initial damage point under 20 MPa confining pressure; (b) initial damage point under 30 MPa confining pressure.</div>

Advances in Civil Engineering

fig11

Figure 11

Figure 11: Experimental Study on Initial Damage Point of Deep Granite under Step Cyclic Loading Method 