Volume 18, Issue No.2


Stress, buckling, sandwich shells, stability, plasticity.


The paper presents an analysis of stress state in a sandwich open conical shells during of stability loss. The shells under consideration consist of lightweight core layer and two face-layers which are load-carrying. The thickness of those faces is assumed to be equal, and the thickness of the core is about 80% of the whole shell thickness. The load carrying faces are made of isotropic, compressible, work-hardening materials. The core layer is assumed to be elastic, incompressible in the normal z direction and it resists transverse shear only. The shell under consideration is loaded by lateral pressure and longitudinal force. Deformation of the shells within the plastic range is possible before buckling. To determine the stress state which occurs during stability loss, the stability equations have to be derived. With respect to the presented research, constitutive relations of the Nadai-Hencky deformation theory, alongside the HMH (Huber-Mises- Hencky) yield condition constitutive relations, are accepted in the analysis.


Acta Mechanica Slovaca. Volume 18, Issue 2, Pages 56–63, ISSN 1335-2393


  The stress state in the three-layer open conical ...


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