Learning Forum

[Ans Ahmad]

Hello Everyone!
I was practicing a simulation for a simple bolted joint, under shear loading (geometry provided by the Ansys innovation course itself). However, during post-processing I noticed a significant difference b/w the averaged and unaveraged Von-mises stresses.
I tried scoping the stress results on Bolt shank only, but there is still a stress concentration at the location where bolt head and its shank meet (sharing screenshot).
 I tried using adaptive mesh convergence as well, but the stresses even increased. Makes me think if this bolt head-to-shank surface is a stress riser or simply a singularity? How should I address that... 

[Armin]

Hi Ans,

Please check the following video where the source of artificially high stresses and how to deal with them are discussed in detail:

Understanding and Dealing with Artificially High Stresses — Lesson 3 - ANSYS Innovation Courses