Numerical simulations of interblock displacement accumulation under low-amplitude dynamic action
The paper is concerned with numerical realization of a computational model for the effect of seismic vibrations on the stressed contact between rock blocks. The numerical simulations demonstrate that nonlinearity of stress-strain relations and pronounced asymmetry of loading and unloading provide a possibility for accumulation of residual displacements in interblock contact zones under dynamic actions of even very low amplitude compared to the strength of geomaterial. It is found that backward motion in elastoplastic interaction of local contact spots under unloading plays a vital part in the process.