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Description / Abstract:
Application
This procedure describes the method for bend testing aluminum
sheet with a semi-guided wrap bend test fixture and the analysis of
test results. A standard bend test specimen of sheet is bent over
the radius of a mandrel by a roller rotating about the mandrel. The
resulting convex surface of the bend is rated as a function of the
amount of damage incurred due to bending about the mandrel. Bend
rating and maximum acceptable r/t (radius / sheet thickness) shall
be prescribed in the material specification. This test procedure
shall be used to identify the maximum mandrel producing the
prescribed bend rating.