A severe material failure where metal separates along a line of high tension, often occurring at the edges of a sheet during deep drawing, rolling, or flanging. It happens when the material's ductility is exhausted and the localized strain exceeds its ultimate tensile strength.
Heard on the job
We got a bad split on the flange radius because the blank holder pressure was too high.
Also heard as
- edge split
- tear
Related terms
Ductile fracture
A mode of metal failure characterized by extensive plastic deformation before the material finally tears apart.
Blankholder
A clamping ring or plate that grips the edges of sheet metal during deep drawing.
Earing
The formation of wavy, uneven edges on a sheet metal cup during deep drawing operations.
Flange
To bend the edge of a sheet metal part or pipe to form a projecting rim for attachment or stiffening.