Numerical Simulation on Rock Shock Accumulation Damage Effect
Shock accumulation damage failure of rock is often seen in engineering at present. The damage model based on stress wave attenuation is firstly adopted to improve the linear elastic constitutive relationship and load type used in original numerical manifold method program, then the influence of load intensity, action time and rock initial damage on accumulation damage is discussed with it. The simulation results show that: (1) Rock shock accumulation damage shows a nonlinearly rise with increase of load action time; (2) Rock shock accumulation damage shows a non-proportional rise with increase of load intensity, and there will be a load threshold which cannot produce accumulation damage; (3) The initial damage of rock has little influence on accumulation damage of time effect.
H. Y. Liu and H. Zhang, "Numerical Simulation on Rock Shock Accumulation Damage Effect", Advanced Materials Research, Vols. 255-260, pp. 4262-4267, 2011