Behavior of bodies of revolution in dynamic contact with a rigid wall

The distinctive features of the collision between an elastoplastic cylinder and a non-deformable obstacle

“…11 Their first values for the instant t are calculated for each computational point A of the impactor surface as if this point, at the instant t -t/2 ( t is the step size with respect to t in the difference scheme), were on the free surface and, using them, the first values of the coordinates z and r at the point A are determined at the instant t + t/2 ( Fig. 1).…”