"maximum contact stiffness" problema

[andros92]

hello to all, I just wrote :biggrin: unfortunately I have a problem with ansys 16.0 that at the end of calculation gives me the following phrase "maximum contact stiffness is too big" and I don't know what to do.I tried different ways:
- I split the various surfaces
- I used augmented lagrange formulation
- I changed the connection type
but nothing, it keeps giving me this mistake.
in particular it is two fork plates, pin and forks all shaped on solidworks; the strange thing is that the bond of the forks with the upper plate considers it, but that with the lower plate does not digest it prorio!! in the result the forks penetrate the lower plate, why?
with the following photo you should better understand the geometry and problem of the two plates

 

[andros92]

:36_1_11:

 

[volaff]

I'm sorry.

 

[andros92]

I'm sorry.

I'm sorry I didn't know. Instead of my problem, can you help me?

 

[volaff]

I'm sorry I didn't know. Instead of my problem, can you help me?

I suggest you present yourself as in every forum you respect.
So, in my opinion, you'll be more likely to have someone answer you.

 

[stefano.garbin]

some quick tips:
1-do so that the mesh of the "contact" surfaces and those "targets" have comparable dimensions, and not excessively large (I see from your image that the cylindrical surfaces of coupling with the stems are meshate quite crude)
2-elimina from cad (or use virtual topology in ansys) the surfaces too small and that would not give "added value" to the simulation. these surfaces just hang mesh.
3-suddivid your simulation in multiple steps... For example, in the first step, keep all the elements steady and stabilize the contact, then in the next steps start applying the loads
4-can sometimes be useful in contact using an initial correction called "adjust to touch". This means that the target surface is "translated" to the contact surface in such a way as to reduce the gap or initial connectivity, which usually send to that country convergence.