Nonlinear Behavior of Elastomeric Bearings. II: FE Analysis and Verification

Abstract

A “composite,” three‐dimensional finite element analysis based on an “equivalent homogeneous continuum” model for the nonlinear behavior of a class (flat layers) of elastomeric bearings is developed. The analysis may also find application for other layered composites that exhibit the fundamental behavior characteristics of elastomeric bearings. The developed “composite” finite element analysis is far less expensive than the alternative of using a general purpose finite element program to perform “discrete” analyses of elastomeric bearings. The analysis not only calculates the overall (average) response of bearings but yields predictions of the local stress and strain states that exist within individual layers of bearings. Both geometric and material nonlinearities are included in the analysis. The analysis (and underlying theory) are “verified” by making comparisons of the finite element predictions to results from discrete analyses of simple configurations and to experimental measurements of actual bearing behavior.