nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

Siemens Community Catalyst Program

The Siemens Community Catalyst program was co-created with our community to acknowledge technology leaders who consistently contribute to the Siemens Community. Nominations are accepted on a rolling basis.

Nominate Now

Mindlin SHELL transverse shear problem

Roman_j

Hi everyone 👋,

I have been working on a model lately, and I think I have encountered a problem concerning the Mindlin shell formulation of CQUAD4 elements:

I noticed that on every SHELL elements of my model, the transverse shear value are null, both of them, like if I was doing a thin-shell formulation (cf picture 1&2 enclosed).

After checking the PSHELL card on my fem file, I can only confirm that from ALTAIR help my shells should have been calculated with the Mindlin formulation, and I should have transverse shear (MID1, 2 and 3 refer to the appropriate material).

Furthermore, I can find the element forces in the ZX direction, from which the transversal shear should be calculated if I am understanding that correctly (cf picture 3).

It looks like the transverse shear, ie term ZX and XY of the stress tensor in the case of this shell, is not output after the analysis. This results in a wrong VonMises stress.

Does anyone knows if I am doing something wrong ? I am also including the PSHELL card of the propertie of the shell (picture 4). I have realised a simple linear static analysis, using the Optistruct 2026 solver.

Thank you all for your future answers,

Roman