HOMOGENEOUS AND SANDWICH ELASTIC AND VISCOELASTIC ANNULAR PLATES UNDER LATERAL VARIABLE LOADS

摘要

This paper presents the results and observations connected with the time histories of deflections of thin, annular plates. Homogeneous and three-layered plates are the objects of the analysis. The plates are loaded in their surface by compressive lateral stresses. Rheological models of linear viscoelastic medium describe the material of homogeneous plate and the material of the layers composing the sandwich plate. During the analysis of dynamic behaviour of three-layered plate with viscoelastic core the observations earlier obtained for viscoelastic, homogeneous plate were used. Results show essential influence of values of material parameters on viscoelastic behaviour of plates. Geometrically non-linear and dynamic problem has been solved using Finite Element Method in ABAQUS system.