Study On The End Stress And Displacement Under Stress Wave Oblique Incidence Of Finite Length Joint

The stress damage of the rock joint is often caused by the stress concentration at the end position,and the stress and displacement of the joint end under the stress wave are more complicated.In order to study the variation of stress and displacement of joints at the end of oblique incidence through oblique incidence,a finite length joint model is established.The combination of normal nonlinear deformation and tangential linear deformation is adopted,and the rock elastic fracture The theoretical solution of mechanics is deduced,and the stress and displacement formulas for the expression of velocity at the joint end of the stress wave are deduced.The stress and displacement results of different parameters are calculated by means of MATLAB software,and the rationality of calculation and analysis is verified by FLAC3 D software.Finally,it can be determined that the stress and displacement field of the joints at the joint of the stress wave are asymmetrically distributed with respect to the joint surface.The peak and the angle of incidence are not completely monotonic in different directions.The influence of the initial stiffness on the end stress The effect of the degree of tangential stiffness is obvious,the joint length increases and the end stress becomes larger.The displacement of the upper and lower sides of the joint is opposite,and the lateral displacement is larger than the vertical displacement.