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|Nonlinear Buckling of Cylinder under External Lateral Pressure|
Posted by: crbeebe ® CBeebe |
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I am performing nonlinear buckling analysis using COSMOS/M of long thin-walled cylinders under external lateral pressure, using the eigenvalue buckling mode shape as an the initial geometric imperfection.
I (perhaps naively) was expecting the resulting load-deflection curve to have a nice sharp knee indicating the buckling load. Instead, I get a nice asymptotic curve that has no discernable slope break point. Does anyone have a recommendation on how I can determine the actual buckling pressure from these results? Or, is there a better way for performing the non-linear analysis?
Many thanks in advance.
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