Bending Moment diagrams for beams in SOLIDWORKS Simulation are plotted in the actual plane of the moment based on the right-hand rule. This means that beam moment effects will be plotted on a plane perpendicular to the shear effects. This can be confusing initially because in two-dimensional media (textbooks and websites), beam moment diagrams cannot be shown in the plane where the moment is so they are shown in the same plane as shear moment diagrams. Please see the following SOLIDWORKS Knowledge Base (KB) solutions for detailed explanations:
You can contact your SOLIDWORKS Value Added Reseller (VAR) for further assistance if necessary, and you can also vote to have the following enhancement implemented in future releases of SOLIDWORKS Simulation:
SPR 927368 - "*documentation* Enhance Online Help to include more information about Beam Diagram shear and moment directions and sign conventions"
To request this enhancement, please search for SPR 927368 in the SOLIDWORKS Knowledge Base (KB) and select 'notify me'.