Bending Cross Sectional Area In Sheet Metal

Percent elongation at frac ture decreases with increasing gage length because of localized necking in the specimen.

Bending cross sectional area in sheet metal. For materials with poisson s ratios ν displaystyle nu close to 0 3 the shear correction factor for a rectangular cross section is approximately. Wipe bending or edge bending is another way to bend sheet metal edges. As a result the wipe die also determines the bend s inner radius. A piece of sheet metal w 20 inches wide is bent to form the gutter shown in the illustration.

Sort of like this the width is x d d. The slack between the wipe die and the punch plays an important role in getting a good result. Let d the debth of the gutter let x the width of the gutter. If the cross sectional area is 48 square inches find the depth of the gutter.

Where is the area moment of inertia of the cross section is the cross sectional area is the shear modulus is a shear correction factor and is an applied transverse load. 2d x 20 therefore. In general as reduction of area increases the minimum allowable bend radius for a sheet ma terial decreases. Total elongation and reduction of area both increase with increasing cross sectional area of the specimen.

It is important to make sure that the sheet is properly pushed onto the wipe die. F stretch forming force lbs ys material yield strength psi uts ultimate tensile strength of the material psi a cross sectional area of the workpiece in2 forces needed to bend sheet metal.