Fatigue of Steel‐Reinforced Elastomeric Bearings

Abstract

Fatigue is an important design criterion for elastomeric bearings, but it is not well understood. This paper examines the design methods currently in use for controlling fatigue. Twenty‐six fatigue tests were performed to evaluate the design methods, and the results are described here. The bearings were tested in cyclic shear or compression. Fatigue cracks formed in the rubber near the steel reinforcement, and they sometimes grew to a significant depth. The important parameters affecting fatigue life are described. Rates of crack growth and location of cracking are presented, and they are correlated with load rate, mean loading, load range, and the material properties. A design method for improving fatigue behavior is then proposed.