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Imperfection sensitivity of cylindrical shells   subjected to axial compressive load is investigated by   means of non-linear buckling analysis and post-buckling   analysis. Non-linear buckling analysis involves the determination   of the equilibrium path (or load-deflection curve)   upto the limit point load by using the Newton-Raphson approach,   whereas post-buckling analysis involves the determination   of the equilibrium path beyond the limit point   load and up to the collapse load by using the arc-length   approach. Limit point loads evaluated from these two approaches   for various imperfection magnitudes show an excellent   agreement which clearly confirms the numerical results   obtained.

Non-linear Buckling and Post-buckling Analysis of Cylindrical Shells Subjected to Axial Compressive Loads: A Study on Imperfection Sensitivity