Bending

Bending is a plastic deformation of material to a desired design when intersection area is not changed. The bending is technological operation of mechanical working, where the non-recuring deformation of source material is generated by common influence of bending moment and lenghtways strengths. Material is deformed in the place of the most bending moment. That means the plastic deformation by bending is heterogeneous and located in the area of source material. The most visible attribute for bending is the change of shaped material axis.
The bending is executed by action of bending moment or strength in term of external loading influence on the shaped material ( the material is situated somewhere as a beam on two supports).