Normal stress is defined as the stress resulting from a force acting normal to a body surface. Normal stress can be caused by several loading methods, the most common being axial tension and compression, bending, and hoop stress.
$\sigma = \frac{dF_n}{dA}$, where $dF_n$ is the normal component of force and $dA$ is the area of the surface element.
Applicable units are those of quantitykind:ForcePerArea
Normal Stress