summary
A solution is developed for the oblique impact of an elastic sphere on a half-space. The Hertzian theory of impact is used for the normal components of force and velocity, and it is assumed that the contact area comprises sticking and slipping regions, in the latter of which the coefficient of friction is constant. The mixed boundary value problem for the tangential tractions and displacements is reduced to a system of simultaneous equations by dividing the contact area into a set of concentric annuli.
The trajectory of the sphere depends on only two non-dimensional
parameters: one related to the angle of incidence and the other to the radius of gyration. A simple rigid body theory of impact gives a reasonable approximation to the more exact method at low and high angles of incidence, but is unsatisfactory at intermediate values.
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