Homogenization of elasticity problems on periodic composite structures

Abstract

Elasticity problems on a plane plate reinforced with a thin periodic network or in a 3-dimensional body reinforced with a thin periodic box skeleton are considered. The composite medium depends on two parameters approaching zero and responsible for the periodicity cell and the thickness of the reinforcing structure. The parameters can be dependent or independent. For these problems Zhikov's method of 'two-scale convergence with variable measure' is used to derive the homogenization principle: the solution of the original problem reduces in a certain sense to the solution of the homogenized (or limiting) problem. The latter has a classical form. From the operator form of the homogenization principle, on the basis of the compactness principle in the L2-space, which is also established, one obtains for the composite structure the Hausdorff convergence of the spectrum of the original problem to the spectrum of the limiting problem.