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[pouryabazyar]

Hello everyone,

 

I encountered a bug in Ansys. I designed one cylindrical shell part. After that, define 3 points and connect them with a line in the design modeler as a beam and define a rectangular cross-section. I put contact between the points and the inner face. Although there is no contact between beams and the surface, It was solved by Anysys. I do not know that it is a bug of the software or analysis setting.

 

I attached its picture. I would be happy to find a solution.

 

 

[Nanda Veralla]

Hello pouryabazyar,

Can you add more images of your model, where are these 3 points defined? Are the points on one end of the cylindrical shell surface? How are the other end of beams defined? Please provide more details about your application and load conditions.

Regards,

Nanda.

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[pouryabazyar]

Of course. As you see the picture, I defined one force and fix support on the shell part (each side). I put one bonsws connection between points and inner face of the cylinder. I have done optimization. My inputs are location of one of the points (x, y, z). The output is maximum stress. According to the rules of Ansys, it will not be solved when the inputs are inappropriate. As you see in the optimization section, I change the location of the point (it does not have a connection with the inner face of the shell). However, it was solved. When I was designing a cylinder as a solid part, it could not be solved. What should I do?

 

[Nanda Veralla]

What is the contact defined between points and inner surface of the shell part? I didn't understand your description below. A beam is defined by these points, and you've given contact definition between end points and inner surface, right? Where is the 3rd point? Does it bisect the beam at the center? 

If your requirement is bonded connection, you can also for shared topology available in Discovery and SpaceClaim. If Ansys gives an unexpected solution for a given setup, it's highly unlikely that it is a bug. Probably verify your setup and loading conditions again for confirmation. 

Regarding the cylinder modelled as solid, what error does the solver give in failed solution? Kindly provide the error screenshot in your follow up reply. You can view the solve.out file by following this path:

Regards,

Nanda

[pouryabazyar]

There is no third point. There are 2 points which are connected with the line. I defined it as a beam. I put one contact between 2 points and the inner face of the shell. There was no an error in my analysis.

As you see in this picture, I changed the location of the points. Although they do not have a connection with the inner face, Ansys is solving this analysis again.

According to the rules of static analysis in Ansys, all parts must have a connection. In this picture, there is no connection between the points and the inner face of the shell but it is solving the problem.
How can I declare this bug to Ansys authorities?

When I am designing a cylinder with a shell part, I do not have a problem. However, I encountered a problem when I designed a cylinder with a shell part.