Engineering Commons^™

Hysteresis Effect And Damping Characteristics Of Shale Under Saturated And Natural States, Chang-Bao Jiang, Cai Wei, Min-Ke Duan, Yu-Fei Chen, Tang Yu, Zheng-Ke Li

Rock and Soil Mechanics

An RLW-2000 micro-computer servo-control rock triaxial testing machine was used to carry out triaxial cyclic loading and unloading experiments of saturated and natural shales under different confining pressures. The mechanical properties and hysteresis effects of two hydrated shales were analyzed. The evolution law of the damping ratio was discussed based on the energy principle. The experimental results show that as the cycle number increases, the cumulative residual strain increases gradually. The relative residual strain decreases first and then tends to a stable region, and finally increases rapidly prior to the rock damage. The deformation modulus of the saturated shale is …