Learning Forum

[Zaid Abd Al-Hadi]

I'm modeling a lamina and I'm applying loads in different ways in order to test its engineering properties.
in the model, I'm using the REINF265 element. when I issue the command PLNSOL,U,X or PLNSOL,S,X it gives the below warning:

"Reinforcing elements are detected in the selected elements set. they are ignored in the nodal averaging"

further, when I calculate the modulus for the lamina using the resulting stress and strain, it is equal to the modulus of the matrix.
it's like the reinforcing elements are not included as the warning indicates.

how to solve this?

thanks in advance.

[Dave Looman]

The message only refers to stress results.  The stiffness of the lamina not changing with reinforcement is apparently due to some other model issue.  For example, if the reinforcement is at the mid-fiber location it wouldn't increase the bending stiffness.  Technology Showcase Example 9 uses reinforcing.

[Zaid Abd Al-Hadi]

Thank you for replying,

I reviewed example 9 of the technology showcase, but there is no info about the commands used, but I found a (.dat & .cdb) files, can I extract the input commands from these files?

I would really appreciate if I could send you the code to check if there is an issue.

best regards,

[Bill Bulat]

Adding to what Dave said...

From your description, I'm guessing you are using MAPDL, not Mechanical (in Workbench), to perform your investigation. If you want to look at results in the "smeared reinforcement" REINF265, you might try selecting those elements (e.g., ESEL,S,ENAME,,265) before making a contour plot so that you are looking at the results in those elements alone. Without the benefit of having created an investigative test case, my guess is that POST1 does not know how to reconcile a results display that includes two element types that differ as significantly as the base SOLID18x and REINF265. I suspect one plots results of one or the other, but not both together. You might start by selecting your REINF265, then plotting the fiber axial stress (PLNSOL,S,X). I would also use /ESHAPE,ON (combined with /GRAPH,POWER - the default display setting) prior to making this plot to visualize the reinforment geometry.

I hope this helps.

--Bill

[Zaid Abd Al-Hadi]

Thanks for replying,

I tried what you said, and yes it gave the result of the REINF material, but unfortunately, faced the same issue, now the calculated modulus = modulus of fibers alone.
how can I be sure that my model represents the actual lamina?

best regards,