Question:
Why are the stresses of the 90° orientation not displayed for a layer with the orthotropy direction 90° for σ-b,90 in RF‑LAMINATE?
Answer:
The indices of the stresses from RF‑LAMINATE, such as σ-b,90, do not refer to the local surface axis system from RFEM, but to the orthotropy directions defined in Window "1.2 Material Properties" in RF‑LAMINATE; see Image 01.
The orthotropy directions can be displayed graphically by activating them in the Display navigator; see Image 02. The red arrow represents the "zero direction" of the stress; that is, the direction of the stress σ-b,0.
The colors of the arrows can be adjusted within the display properties (category General, Axis System, Surface Axis Systems x, y, z [orthotropy directions]); see Image 03.
Thus, the stress σ-b,0 in this direction applies to each orthotropy direction of a layer defined in RF‑LAMINATE, and σ-b,90 applies to the stress transverse to the defined orthotropy directions.