Nonlinear Buckling

Hi,

I think this is not there in optistruct. You need to move to radioss for it..

Hi Gopal,

I think even linear buckling factor is not possible in radioss... Pls help me with nonlinear buckling

Hi,

Linear buckling factor can be obtained in optistruct. 

Radioss does not seem to have direct option for calculating buckling factor and calculation needs to be done using post-processing results I think.

Can you provide more details regarding your problem statement?

Hi

Did you try with optistruct loadstep 'geometric nonlinear'?

Hi Gopal and Tinh

I need to find the  buckling load for a nonlinear geometric case.

I tried Geometric nonlinear loadstep , but i  don't find loadstep for nonlinear buckling. Linear buckling is available

Hi

I think nonlinear buckling is nonlinear geometry loadstep.

To find buckling load, increase it step by step, and observe bending stress value which starts to increase once structure reachs critical

Hi Karthic,

It is possible to perform non linear buckling in RADIOSS. Please find the attached tutorial for the same.

You can address post buckling application using nonlinear geometry (Implicit) loadcase. You may have to use any of the Arc-Length methods to solve post-buckling analysis, attached is an example which illustrates the same.

Unable to find an attachment - read this blog

Thank you George

Hello Karthic,

Did u find solution for nonlinear buckling analysis in radioss. I gone through above PDF, these are helpful to know which control card will be used in buckling analysis, but unable to perform simulation.

If anyone know, please share with me. It will be much helpful.

@Karthic

solving in optistruct for nonlinear buckling will automatically using radioss 

Unable to find an attachment - read this blog

If anyone know, please share with me

Hi GAJENDRA KUMAR NHAICHANIYA

The demo files in the pdf referred above are shared. You can refer this to understand the steps involved in performing the analysis

Unable to find an attachment - read this blog

Pranav Hari

Thanks for reply, and shearing files. But as i go for simulation it shows error as below - 

 ROOT: Snap  RESTART: 0001
 NUMBER OF HMPP PROCESSES     1
MESSAGE ID :          247
 ** ERROR MPI EXEC FILE SHOULD BE USED FOR MUMPS SOLVER
     ERROR TERMINATION

 ==== End of solver screen output ==== 

 ==== Job completed ==== 

Plz help me to remove error.

I understood many of cards used in tutorial even I also applied necessary card for implicit run, but every time got error.

Hello Karthic,

Thanks for shearing file but i'm looking for solution in Radioss.

Hi GAJENDRA KUMAR NHAICHANIYA

Can you please share all the .OUT files and also which version of HyperWorks are you using?