Geometrically nonlinear static analysis of sandwich plates and shells

摘要: Sandwich shells composed of three layers: two thin and very strong faces, the soft comparatively weaker core which is much thicker than their neighbouring layers covering it from up down, are considered in paper. The proposal a finite element adequate to such kind structural members presented. In paper based principally on Ahmad original author's adaptation this nonlinear range It was assumed that faces materials exhibit orthotropic properties, only elastic deformations taken into account. static analysis performed within fully geometrically range. ultimate purpose work determination critical value load intensity factor quasi stability analysis. All procedures related tracing equilibrium paths adopted codes prepared before for homogeneous shells. Two verification problems inserted. They confirm correctness approach.