What is the curved section of a bend called?

The term that describes the curved section of a bend is known as the bend radius. This is a key concept in metal forming and bending processes. The bend radius is crucial because it directly affects the integrity of the material during shaping. When metal is bent, some of the material is compressed while other parts are stretched. If the bend radius is too small for the specific material being used, it can lead to cracking or failure of the metal.

Understanding the bend radius helps in determining the limits of how much a piece of metal can be deformed without compromising its structural integrity. This makes it essential for designers, engineers, and technicians to consider the bend radius when planning bends in metal structures, ensuring that the components can withstand operational stresses without failure.

In contrast, while the other terms relate to aspects of bending, they do not specifically refer to the curved section directly. For example, the bend allowance refers to the additional length of material needed to account for the material displaced during bending. Bend transitions can describe the gradual change between the flat section and the bent section, while bend edge refers to the end of the bend but not specifically to the curved aspect itself. Understanding these definitions is essential for ensuring proper techniques in aircraft metal repair and maintenance.