Browse/search for people

Publication - Professor John Hogan

    On the regularization of impact without collision

    the Painlevé paradox and compliance


    Hogan, J & Kristiansen, KU, 2017, ‘On the regularization of impact without collision: the Painlevé paradox and compliance’. Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences, vol 473.


    We consider the problem of a rigid body, subject to a unilateral constraint, in the presence of Coulomb friction. We regularize the problem by assuming compliance (with both stiffness and damping) at the point of contact, for a general class of normal reaction forces. Using a rigorous mathematical approach, we recover impact without collision (IWC) in both the inconsistent and indeterminate Painlevé paradoxes, in the latter case giving an exact formula for conditions that separate IWC and lift-off. We solve the problem for arbitrary values of the compliance damping and give explicit asymptotic expressions in the limiting cases of small and large damping, all for a large class of rigid bodies.

    Full details in the University publications repository