Learning Forum

[venugopal4048]

 Hello  I am using ansys 19.2 student version. but i cannot find finite element modeler option in the tool box. Is it possible get it?  Thanking you

[peteroznewman]

FE modeler is no longer included. What did you need it for?

[venugopal4048]

Dear sir!

I am doing nonlinear buckling analysis with geometrical imperfection. So, the imperfection added to the geometry in mechanical APDL by the code,

prep7

UPGEOM,1,1,1,file,rst

cdwrite,db,file,cdb.

After that it need to transfered to FE modeler and then static structural tool. But in Ansys 19.2 FE modeler is not available. We did not have an option to directly transfer that APDL file to static structural. 

This is the model what exactly i want to do.

Is any alternate way is there to do this without FE modeler?

Thanking you

[peteroznewman]

In Workbench, look in the Component Systems branch of the Toolbox. Drag out an External Model.  In the Setup, you can read in a cdb file and feed the Setup cell into the Model cell of a Static Structural analysis system.

[jj77]

You do not need this anymore - do a static to buckling to static and that will give the option to include imperfections from the buckling analysis. See below (look at the bottom right on the image to see the scale factor and to set it to something appropriate, I have it here as 0.001, but it is up to you and what the actual imperfection looks like - this will influence).

 

[peteroznewman]

Even better!

[jj77]

I think this is much easier - it was needed as the other method was just to long and complex

[venugopal4048]

Peteroznewman and jj77.

you both are really helped me.

I have one more question.

In Ansys, after getting solution of any problem it shows three set of values like maximum, minimum, averaged (Stress, Strain and Displacement). From these three which one we should consider? and Why?

Thanking you!

[peteroznewman]

For von Mises equivalent stress, I am only interested in Maximum values.

For a displacement in the negative direction, I would be interested in Minimum values.

[venugopal4048]

Hi Peter!

How to write a model .cdb file in Ansys workbench? I already know, how to write .inp file. 

[peteroznewman]

I don't know. What do you need a .cdb file for?

[venugopal4048]

Previously I asked you a question, why finite element modeler is not available in Ansys 19.2 version? For that, Instead of the finite element modeler, you suggested to use an external model. Above mentioned image, which shows what you stated earlier. My ultimate aim is to add geometric imperfection to the model (more than one or two modes at the same time). To proceed with this I want a .cdb file.

Thanking you peter.

[Luana]

Dear jj77,

I have the same problem that mentioned in the topic with missing finite element modeler, I use  version 19.1.

I have found your solution for this version, and tried to share the static structural modul with the solution of the Eigenvalue buckling, but it is forbidden. After that I've just opened a static structural modul separately, and afterward connected the Eig.V solution with the model., but when I tried to open the model, I got an error message.  

I checked the properties of the Eigenvalue buckling solution, and some rows are missing in my analysis:

    5th               "update conditon parameters" 

 

Could you help me how should I set these parameters to be the same in your model?

 

Thank you in advance.

 

[HerrHerk]

I tried the same, but get the following error all the time. Has anyone experienced something similar, or has any idea what the problem is? nn

[Aneesh Ravikumar]

I want to use inistate command and upgeom to transfer the stresses and deformation of a press-fit  (intereference) using the contacts option offset with a suitable intereference treatment, to another larger assembly where I wish to use this specific contact defined as press-fit in the first simulation as bonded to solve the static structural simulation linearly. I have used the write and read commands associated with inistate but the initial stresses after importing do not match at all. 

The above image attached is the stress contour I expect as initial stresses upon import, but it rather ends up

as attached below.

 

Could someone guide me what I must check to ensure things as consistent.

 

Thanks in advance

 

[nikhil.gupta]

Hi,

Please suggest an easiest method to include geometrical imperfection for multiple mode shapes that is to include the geometrical imperfections for more that 1 number of mode shapes. 

Using this method as explianed above we can only include imperfections for only 1 number of modes.

Kind Regards,

Nikhil Gupta

[ErKo]

See this post for that:
/forum/forums/topic/multiple-mode-geometric-imperfection/

All the best

Erik

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