Based on the general solution of the displacement method for isotropic plane
problems, the analytical solution for the plane problem of coated materials
subjected to an arbitrary concentrated force on the free surface has been derived
explicitly by using the image point method. The displacement functions
are assumed to be the infinite series of the harmonic functions defined in
the local coordinate systems with their origins placed at different image
points. The harmonic functions corresponding to the higher-order image
points can be deduced from those to the lower-order points by the recurrence
formulae presented in this paper, and the first two harmonic functions are the
displacement functions for the solution of a semi-infinite plane subjected to a
concentrated force on the free surface. The theoretical formulae have been
confirmed by numerical, finite-element-based, results in a special coated
material.
Keywords
analytical solution, coated material, image point method,
displacement method, interface