result interpretation

Altair Forum User

I carry the simulation of a model,obtain the result in a HV as stress and displacement plot. I want to

 

know the exact load at which model starts buckling.How to find load?(Already used SPCForce in a

 

NLGEOM but unable to find exact load)

Altair Forum User

Hi Tushar,

 

It may not be possible to get SPCF with NLGEOM.

 

Instead you can run NLSTAT analysis.

Altair Forum User

When you run the NLGEOM load case in bulk it actually translates the model to our block format and runs in our block solver. Currently there is no way to request spc forces for NLGEOM using the bulk format.  You can
however edit the _0000.rad file that is created when you run your model  and add the necessary lines to request the nodal reaction forces to be  saved to the time history file *T01.

What you need to add looks like this,

 

/TH/NODE/1

spc                                                                                                

REACZ    

      1119         0                  

 

Please refer to Help document for more information on TH/node command.                                                             

Altair Forum User

Sir actually i carried the simulation in optistruct..so please suggest for optistruct.

Altair Forum User

SPCF is not possible with NLGEOM. Please try running NLSTAT

tinh

Altair Forum User said:

Sir actually i carried the simulation in optistruct..so please suggest for optistruct.

 

Hello tusharpatil123

If you just want to find the load at which your model buckling (critical load, buckling load), you need only to perform Linear Buckling analysis instead of NL

Please follow procedures as in Help>Optistruct>Tutorial > basic small displacement > buckling