I did a simple 1D beam model with a load applied, and the results didn't show me the stress values, although the displacement values were shown. The output request is in the H3D format for both outputs, and the Pbeam properties have the moments of i

Afonso Rainha

Adriano Koga_20259

If youre using the regular PBEAM, you also need to definie the section stress evaluation points.

If you use regular section, you can use PBEAML which already have these points according to the section. (take a look at the help of OptiStruct for PBEAML)