Rotating Beam Fatigue Tester

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This Demonstration plots the tension variation at the surface of a cylindrical specimen in a rotating beam fatigue test.
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Contributed by: Erik Mahieu (December 2011)
Open content licensed under CC BY-NC-SA
Snapshots
Details
In the elastic domain, tension is proportional to deformation, which can be expressed by , where
is Young's modulus and
is the elongation of the material. For a cylindrical specimen of radius
, bent over a radius
at
rpm in the rotating beam test, this means (for the outer fibers at the surface) that
.
A smaller bending sector is used to accommodate specimens with larger radius. The angular speed in the Demonstration is only indicative.
Young's modulus for steel is 195 GPa.
A working example of this test can be found here.
Permanent Citation
"Rotating Beam Fatigue Tester"
http://demonstrations.wolfram.com/RotatingBeamFatigueTester/
Wolfram Demonstrations Project
Published: December 13 2011