Buckling loads for sandwich structures having FRP faces and FGM core

[摘要] The aim of the present paper is to present a consistent 2D formulation of sandwiches (CS - classical sandwiches and FGMs - functionally gradient materials) that is accurate enough for a prediction of thermo-mechanical buckling load. Various kinematical hypothesis and variational formulations are studied in order to compare them with 3D finite element modelling and to estimate the effectiveness of 2D approximations. The examples deal with the compressed rectangular plates and shallow cylindrical panels. The effects of boundary conditions on both values of thermal and mechanical buckling loads as well on the variations of bifurcation loads with fibre orientations are discussed in details.

[发布机构] Institute of Machine Design, Faculty of Mechanical Engineering, Cracow University of Technology, Kraków, Poland^1

[效力级别] 材料工程

[关键词] 2-D approximation;3-d finite element modelling;Bifurcation loads;Cylindrical panels;Functionally gradient materials;Rectangular plates;Thermo-mechanical buckling;Variational formulation