What is the term used to describe the curvature of a bend in sheet metal?

The term that describes the curvature of a bend in sheet metal is known as the bend radius. This dimension is crucial because it directly influences the material's stress distribution during the bending process. A larger bend radius typically results in a more gradual curve, reducing the likelihood of cracking or failing of the material. In contrast, a smaller bend radius can increase stress concentration, potentially compromising the integrity of the sheet metal.

Understanding the bend radius is important for manufacturers because it helps ensure that the bend can be made without exceeding the material’s yield strength, which is essential for maintaining the structural integrity of the final product. This term specifically denotes the inside radius of the bend, which is particularly relevant for calculating how the material will behave during and after bending.