Experimental Study on Damage Evolution Characteristics of Rock-Like Material

Based on the continuum damage mechanics, the damage variable of wave velocity is defined, and the piecewise curve damage evolution of rock material constitutive model is constructed. Using uniaxial compression experiments, using ultrasound on the wave velocity in the process of compression test, the relationship between strain and velocity is obtained, and then the experimental parameters of constitutive model were analyzed. Analysis shows that:...