This paper deals with the impact behavior of elastic pseudo-rigid bodies. I
t is shown that in the case of a spherically symmetric, linearly elastic ps
eudo-rigid body impacting on a rigid foundation, energy conservation necess
itates the existence of multiple impact events. A comparison is made with t
he dynamic Hertzian theory in terms of the coefficient of restitution and t
he duration of impact. In addition, the chaotic nature of the long-term dyn
amics of this system is explored qualitatively. (C) 2000 Elsevier Science L
td. All rights reserved.