ANSYS error message about stress concentration and KSCON command?

02 December 2021 1 5K Report

I'm working on the modal analysis of a cracked rectangular plate and come across an error. A sketch of the model is shown in the attached graph. I use KSCON command to model the stress concentration at the crack tip. When the crack length is small, everything is fine and I can get results. However, when the crack length is medium, say 0.2 times the crack width, I get this error:

*** ERROR *** CP = 3.125 TIME= 11:12:56

The stress concentration element generation will interfere with the

area's boundary.

I tried making the mesh even finer and the error was still there. I googled it and didn't find any information regarding this error. Does anyone have this error before? Is there a way to avoid it?

Xutao Sun

Just a follow-up. The error can be avoided by making the crack like a V shape. Essentially the idea is to separate the two sides of the crack. For natural frequency calculation, a tiny V shape has little influence over the final results.

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