Paweł Jasion

Global buckling of a sandwich column with metal foam core

The subject of the paper is about sandwich beam-column with a metal foam core. The global buckling phenomenon of an axially loaded member is investigated. Two analytical models of the beam-column are presented. In the first model, a classical one, the mechanical properties of the core are assumed to be linear. In the second model, the non-linear behaviour of the core is taken into account. Solutions of these two models are presented and the formulae for the critical loads are determined. The numerical finite element models of the beam-column are also elaborated and the linear buckling and the non-linear analyses are performed. The results of experimental tests on the aluminium sandwich beam-columns with aluminium foam core are described. Analytical, numerical finite element model and experimental values of the critical loads are compared.

Stability of an ellipsoidal head with a central nozzle under axial load

Abstract The subject of the numerical investigation is an ellipsoidal head with a central (axis-symmetrical) nozzle. The nozzle is loaded by axial load force. The ellipsoidal head is under axial-symmetrical compression load. The numerical FEM model is elaborated. The calculation will provide the critical loads and equilibrium paths for the sample head.. The investigation will measure the influence of the diameter of the nozzle on the critical state of the ellipsoidal head.