This content has been marked as final. Show 3 replies
I have no actual studies of this kind yet.
I was just wondering about it.
This thought came from a different subject, but there is no real connection.
After the latest Companion Seminar,
I am doing some test with the fatigue solver, and I was looking for a behaviour, i.e.:
Von Mises values don't tell compression from tension, so VM can roughly predict fatigue zones just when the load factor is -1 and VM-high zones are alternatively loaded in tension and compression.
If the factor is 0, I expect compression-predominant high-VM zones to be less affected by fatigue than tension-predominant.
Am I right or this is not considered in our solver?
Yes, an asymmetric SS curve can be entered into CW Nonlinear. If the curve is defined completely in Q1, CW assumes symmetry. However, it will recognize a different compressive response if you key it in.
What material are you exploring?
I was wondering if in a non-linear study Cosmos can analyse a stress-strain curve that is not symmetric around the origin, i.e. the material has a different curve in compression and in tension.
Of course I mean a difference that can start in the very first elastic domain, not something that could be simply judged with a Mohr-Coulomb criterium...
I know some cast irons show such a property, even if this is more important in dynamic problems.
Has anyone encountered this theme, so far?