Problem of Singularity
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Hi,
i'm currently working on the case of a small device and i'd like to perform a static stress analysis with simulation multiphysics.
Unfortunately the stress-results are almost linearly dependend upon the mesh size.
Using percentaged mesh-size of 100% leads to a maximum stress after van mises of approximately 100MPa under a load of 1800N.
Using percentaged mesh-size of 40% leads to a maximum stress of 1300MPa.
Using e.g. 2.5mm absolut mesh-size even exceeds 1300MPa stress.
Somehow both results don't seem realistic to me...
Well, according to some articles i found this problem ist known as "Singularity", right?
Due to the fact that I lack the necessary experience in FEM-Analysy I'm wondering, how to get reliable results.
I hope you can help!
Thank you for your effort in advance!
Greets,
Christian
P.S.: The Geometry is displayed in the attachment. Its dimensions are 77x41x16mm with a minimal thickness of 1.5mm. Material is stainless steel, aisi 405, if relevant. Load magnitude is 1800N.