How to view stress contours including the other half when using symmetry boundary condition? 2

[mdama]

I modeled half of the structure using symmetry but now in results, I want to also observe the other half with contours on it. How can i do that?
Thanks

 

[Mustaine3]

View -> ODB Display Options -> Mirror/Pattern

 

[FEA way]

It’s rather simple actually - use View —> ODB Display Options —> Mirror/Pattern and select appropriate mirror plane - the one in which the model was cut in half (XY, XZ or YZ).

 

[mdama]

Thanks, I picked XY mirror plane but It attached it to the wronge side which I don't want. I want it to put it the other side. How to do that? Please see these two pics.
1(

https://www.dropbox.com/s/3a2n6b5kuxw16h4/view1.PNG?dl=0)

and 2 (

https://www.dropbox.com/s/f1xt655f7grnwie/View2.PNG?dl=0)

 

[FEA way]

You would have to define (and select in the mirror operation window) user coordinate system instead of global CSYS.

 

[mdama]

In the pattern, I just see global only, not user corrodinate system.

 

[FEA way]

Its labeled Mirror CSYS. In this part of the window you select coordinate system. But first create new one so that it can be selected from the list.

 

[mdama]

Thanks

 

[mdama]

It works, one question here:
Does it make sense to have stress contour on the top (

https://www.dropbox.com/s/amarv3gtz388ur3/topsurface.PNG?dl=0)where

a punch is pushing the surface compressing in fact, but at the bottom no stress contours? (

https://www.dropbox.com/s/uern4jgvtpr3y48/bottomsyrface.PNG?dl=0)I

fixed the bottom surface so as not have any movemnet and rotation in alls directions.

 

[FEA way]

Measure the stress on the bottom (probe tool) or adjust the scale. There should be some increased stress there but maybe you can't see it because it's lower than in the perforated area. Also can you attach a picture showing all boundary conditions ? Did you use encastre on the bottom surface ?

 

[mdama]

Please see this image as the fixed boindary condition applied. (

https://www.dropbox.com/s/p8qxz6oguf02emp/BC.PNG?dl=0)

I want to make sure that If we apply compression (displacement control) on the top surface of a structure and fixed BC on the bottom, Should we expect the same contour stress on top and bottom? What about the reaction forces?

 

[FEA way]

I think that this perforated part of the structure may interfere stress contours. That's why you should try to adjust the scale.

Good that you've mentioned reaction forces. They should be checked in such cases. The easiest way (assuming the simulation doesn't take a lot of time to compute) is to replace this encastre BC applied on face with coupling constraint on this face connected with reference point in the middle. Just constrain this reference point to easily measure reaction forces (no need to sum nodes in this case, just one point to evaluate for RF).

 

[mdama]

Thanks, What do you mean by scale? How can I do that?

 

[FEA way]

In the Contour plot options there’s a Limits tab. There you can adjust the range of values displayed on the contour plots. This is not the only thing that can be done though. You could also turn off averaging or switch to quilt type plot but start from adjusting Max and Min values in the Limits tab.