Nonlinear Buckling Analysis of a Slender Column using ANSYS Workbench Mechanical

[@kirtankumarsahu8599]

hello sir, this is a really helpful video I found but I am having some queries, please answer me to understand it clearly. 1. Is it only geometric nonlinearity analysis? 2. Did you apply imperfection by applying a transverse load of 1 N? 3. Have you added material nonlinearity in this analysis? 4. Could you please tell me how can we add material nonlinearity?

[@ngocthangnth]

Thank you fo sharing this video. Just having a question about the material you used. Did you enter non-linear properties for the material when running the non-linear buckling analysis? Thanks!

[@mertsi1340]

He used the same linear material in the analyses. The non-linearity was that he turned "large deflections" ON for the nonlinear analysis.

[@闵丽]

A good tutorial. Thank you.

[@gdeepika1205]

Can this procedure be used for non linear analysis of concrete filled double skinned tube column?

[@Owlzon]

Hi, I'm getting mutiple spinkes in the Total Deformation in static structural after the eignvalue analysis. Is this normal? WHat I understood was buckling happens two times, could this happen?

[@larrypena1944]

How many capacity must have my computer for make a nonlinear analysis in a reasonable time? I mean RAM memory or to the processor, my problem is a stiffened panel, 1370 mm the length and 600 mm the width,specifically a nonlinear buckling analisys, i have tried a lot of time but i dont have good results

[@sprasanna1905]

Sir can you please help me with GMNIA analysis for a I section based column

[@FEAnalysis]

GMNIA analysis can be done by adding a shape imperfection using the UPGEOM command and also specifying a non-linear material model such as using BKIN elastic-plastic material properties. Unfortunately I could not generate on demand tutorials but I will keep this topic in mind for my next batch of videos. Thank you for your interest in my video tutorials.

[@sprasanna1905]

@@FEAnalysis for the model can you tell me is this good for high strength steel welded columns to consider this model and is this avaliable in ansys apdl

[@krisztiansziklai6992]

How can you read the 2nd buckling mode with upgeom?

[@FEAnalysis]

Thanks for viewing this video and your post. The Upgeom command syntax is: "UPGEOM, FACTOR, LSTEP, SBSTEP, Fname, Ext,--". You can read the load step and substep in the *.rst file corresponding to the mode shape you want to apply as a shape imperfection.

[@krisztiansziklai6992]

​@@FEAnalysis Even if I calculate two modes, there will be only one .rst file in the SYS-1/MECH folder. I used this command to read: upgeom,0.0005,1,1,C:\......\dp0\SYS-1\MECH\file,rst This always loads the 1st buckling mode. How can I apply the 2nd buckling mode as a shape imperfection? Thanks for your help.

[@FEAnalysis]

@@krisztiansziklai6992 All mode results would be stored in the same rst file e.g. listed in APDL for a sample modal analysis: SET TIME/FREQ LOAD STEP SUBSTEP CUMULATIVE 1 5.9392 1 1 1 2 8.6926 1 2 2 3 37.113 1 3 3 4 54.424 1 4 4 5 103.34 1 5 5 6 123.82 1 6 6 So simply try reading the second substep with this command (Load step 1, substep 2): upgeom,0.0005,1,2,C:\......\dp0\SYS-1\MECH\file,rst

[@selmandjeffal6140]

How can we create a cantilever beam subjected to a non-conservative follower force by ansys !