Hello everyone. A brief premise: as far as I know, both node values and element values are obtained averaging the Gaussian point of each tetraedrical element of the mesh model. Refining the mesh should result in converging of the maximum stress and displacemente for both visualization AND the reduction between the nodal maximum stress and elemental one.

The element values has the advantage of level the singularities due to a bad model while refinig is the leading process for the same goal in node values plot. There shouldn't be a "true" o "better" plot if I choose to use one or the other.

Now, this is my problem. After many attempt to have a converging analyis (h-adapative method went always in faling the mesh), I finally found a satisfying meshing for the plot but here is the downsize: maximum stress in element values is below tha yield stress (170 Mpa) and only in one ( ! ) element (circa 166 MPa), the maximum stress in nodal values is above the yield stress (226 MPa) in a small area, very negligible compared to the model.

What should I do or what would you do? Try to find an answer or a similar case to mine but I'm stuck in a crossroad no more knowing if what I'm doing is right or wrong. I'dd appreciate your help, please.

Thanks in advance.

A little update. With the same mesh size, I run a new analisys increasing the Jacobian nodes to 16. Here the results:

Element values plot

Element values section near the maximun stress:

Node values plot:

Node valus Iso clipping (170 MPa limit):