Internally pressurized ellispoidal tank and the maximum stress predicted by BOSOR4/BIGBOSOR4 from linear and nonlinear models

This is Fig. 6 from the 1986 users manual paper, “BOSOR4 – Program for stress, stability and vibration of complex, branched shells of revolution”, by David Bushnell, in STRUCTURAL ANALYSIS SYSTEMS – Vol. 2, A. Niku-Lari, editor, Pergamon, 1986, pp. 25-54.

This slide shows linear and nonlinear axisymmetric predictions for an internally pressurized ellipsoidal tank with variable thickness. The stress concentration at Point C is caused by load path eccentricity, and the predicted stresses decrease if nonlinear geometric effects are accounted for.

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