Critical loads calculations of annular three-layered plates with soft elastic or viscoelastic core

This paper presents the computational results of annular three-layered plates loaded in the plane of their facings. The calculations are carried out by means of finite element method using the ABAQUS system. The critical and supercritical behaviours of plates with connected analysis of static and dynamic loss of their stability have been observed. The both examples of the axially-symmetrical form of plate buckling and circumferentially wavy form of its critical deformation are the subject of the investigations. The wavy form is particularly observed for plates compressed on the outer perimeter. The way of modelling of three-layered plate with the soft core made of the foam with elastic and viscoelastic properties is highlighted and discussed in the work.