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This and the next image are from:
P. Jasion and K. Magnucki (Institute of Applied Mechanics, Poznan University of Technology, Poland), “Stability of an ellipsoidal head with a central nozzle under axial load”, Archives of Civil Engineering, Vol. 61, No. 2, 2015
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.
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