Learning Forum

[Federico Parisini]

hi, I really need help understanding how to implement a fatigue simulation of threaded connections. i have correctly defined the material of the screws (S-N curves). 
The point is that performing a fatigue analysis on a two-step analysis, in which in the first step I have the bolt pretension and in the second the application of the loads, makes me doubt whether the software considers that the preload is also applied cyclically. 
So I eliminated the bolt pretensions and only considered the loads, but I'm not sure it's right not to consider the preload of the screws. How can I consider the static load of the screws and the cyclic loads at the same time? thank you.

 

 

[Erik Kostson]

Duplicate - use first post:

/forum/forums/forum/discuss-simulation/structures/