Definition - What does Bending Moment mean?
Bending moment refers to the point in time when the applied maximum stress on a metal surface is equal to the ultimate strength of the material, thereby causing material failure. Bending moment is a vital indicator of the onset of intergranular corrosion.
Corrosionpedia explains Bending Moment
Several materials are empirically examined to determine their bending moments prior to industrial installation and applications. This allows manufacturers to ensure that metal structures such as pipelines, tanks and vessels are not exposed to forces greater than their ultimate strength which may cause catastrophic failure.
Bending moments are also vital criteria to determine the extent of plastic deformation a metal is capable of withstanding. Changes in material shape due to the bending moment can be measured by the curvature of the neutral surface.
When the bending moment is significant to onset tensile stresses greater than the yield stress of a material. bending failures occurs. This is known as a plastic hinge.