Hi: I am looking to analyze stress strain in a rectangular column to be loaded axially beyond the elastic limit. I know how to apply plastic material properties. I want to determine if column will bend and what will be bending strain. Can this be done in static analysis or do i need to use buckling analysis.
Buckling step is for linear buckling analysis only. For nonlinear buckling, you should use static or (less often) dynamic step. Just make sure you enable Nlgeom because otherwise there will be no buckling.
buckling of column can be categories as local and global, in case of solid rectangular column a global buckling occurs not local. Further is separated by slenderness ratio, it classified as short, medium or long. Short column and compact sections governed by yield of material, long column is elastic buckling. In case of inelastic buckling so that’s class of medium slenderness, imperfection need to define for initially buckling loads in large deformation analysis, the value can be taken as L/1000 and initial residual stress need to be modeled for more accurate in results of common fabricated steel shapes.
Thanks FEAnalyst and Synt. This is helpful. I was able to run as suggested in the video tutorial shared by FEAnalyst and my analysis worked. It took two hours to complete.
can be a screenshot of models provide? since few hours is unusual and it seems too long for such analysis in CalculiX.