Kerbspannungen sind Biegespannungen – was sind gute und böse Kerben?

Notch stresses are bending stresses – what are good and bad notches? The origin of a stress concentration in an engineering component can be explained by the imagination of superimposed bending stress. The curved surface of a notch can also be seen as the concave side of a heavily curved beam under bending. The nonlinear stress distribution of the beam under bending superimposes with the nominal stress and causes the stress concentration. In order to avoid such stress concentrations the increase of stress along the notch contour has to compensate with the decrease of the nominal stress. A multi‐linearized model demonstrates the interaction between the flow of stresses and the increase of the cross‐section of the component.