F = (YS+ UTS)/2 * A 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 Bending
Bend Radius- As a rule, inside bend radius should be equal to material thickness. When the radius is less than recommended, this can cause material flow problems in soft material and fracturing in hard material.
BEND RADIUS FORMULA: Formula to determine minimum hose length given bend radius and degree of bend required. =___A x 2πB360° = Minimum length of hose to make bend (bend must be made equal along this portion of hose length).
Minimum Bend Includes Minimum Closeness of Cutout to Bend Radius Cold Rolled Steel – 14 gauge ( 0.075” | 1.91mm )
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