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US 6,418,770 B1Granted
Method for improving the fatigue life of a tubular stabilizer bar
AssigneeMeritor Suspension Systems Company
InventorMichael Peter Binno
Life of this patent
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AssigneeMeritor Suspension Systems Company
InventorMichael Peter Binno
Estimating the term…
An autofrettage process employed on the inner surface of a tubular stabilizer bar. Road shock and other vibrations subject the stabilizer bar to tensile stresses. Tensile stresses cause fractures and decrease the fatigue life of the bar. In employing an autofrettage process, a pressurized fluid is introduced into the interior space of a sealed stabilizer bar, slightly increasing the inner diameter of the stabilizer bar. As the inner surface of the stabilizer bar is deformed, residual compressive stress forces are created which counteract and oppose the tensile stress forces. The residual compressive stress forces prevent the tensile stresses from fracturing the inner surface of the bar, increasing fatigue life. A shot peening process can be employed on the exterior surface of the bar to create residual compressive stress forces which counteract exterior tensile forces.
A method for improving the fatigue life of a tubular stabilizer bar of a vehicle suspension system having a plurality of bends and an inner diameter comprising the steps of:
A method for improving the fatigue life of a tubular stabilizer bar of a vehicle suspension system having a plurality of bends and an inner diameter comprising the steps of:
A method for improving the fatigue life of a tubular stabilizer bar of a vehicle suspension system having a plurality of bends and an inner diameter comprising the steps of:
Dependencies are inferred from the claim text.