Abstract:
A new model for a Timoshenko plate
contacting by the side surface or the edge of the bottom surface
(with respect to the chosen coordinate system) with a rigid
obstacle of a given configuration is justified. The non-deformable obstacle is
defined by a cylindrical surface, the generators of which are
perpendicular to the middle plane of the plate, as well as by a
part of the plane that is parallel to the middle plane of the
plate. A corresponding variational problem is formulated as a
minimization of an energy functional over a non-convex set of
admissible displacements. The set of admissible displacements is
defined taking into account a condition of fixing and a
nonpenetration condition. The nonpenetration condition is given as
a system of inequalities describing two cases of possible contacts
of the plate and the rigid obstacle. Namely, these two cases
correspond to different types of contacts by the plate side edge
and by the edge of the plate bottom surface. The solvability of
the problem is established. In particular case, when contact zones
is previously known, an equivalent differential statement is found
under the assumption of additional regularity for the solution to
the variational problem.