Learning Forum

[Johnson Ezenwankwo]

Hello Peter, I did a simulation to obtain the homogenized properties of a UD RVE. XTension case comes out like so, with the edges pulled farther out than the other parts of the XFront. I feel something is not right as Abaqus gave different results both in deformation and values.

Used a roller boundary condition on each of the opposite sides. Xback, Ybase and Zback. Then I created a remote point a small distance away from Xfront for XTension case. Finally, some constraint equations to link the remote displacement to the Xfront.

THE ISSUE IS THAT THE EXTENSION I GOT HERE HAS A TOTALLY DIFFERENT RESULT FROM WHAT I OBTAINED FROM ABAQUS BOTH QUANTITATIVELY AND IN GRAPHICS. THE GRAPHICS IN ANSYS, AS SEEN IN THE ATTACHMENT, IS EXTENDED OR FRAYED MORE AROUND THE EDGES THAT THE MIDDLE PART. I FIND THIS UNDESIRABLE. PLEASE HELP

[Armin_A]

Hi Johnson,

If you're looking for periodic boundary conditions for your RVE, check if the Linear Periodic option is helpful for your case. This is accessible after adding a Symmetry Folder Object under the project outline. Please see the image below:

 

 

[Johnson Ezenwankwo]

Thanks, it's asking for lower and higher boundary selections and some length in the preceding form.

[Johnson Ezenwankwo]

Thank you, Armin. When I added Linear Periodic, it shows this:

[Armin_A]

Hi Johnson,

Please see the forum thread below where this topic is discussed along with theoretical aspects of periodic symmetry. Some helpful links are also provided there.

https://forum.ansys.com/forums/topic/high-and-low-boundary-in-linear-periodic-symmetry/