FEM ANALYSIS OF HIGH DAMPING LAMINATED RUBBER BEARINGS USING AN ELASTIC-PLASTIC CONSTITUTIVE LAW OF THE DEFORMATION HISTORY INTEGRAL TYPE

Abstract

When we study a rubber-like material based on a numerical simulation such as FEM analysis, selection of the proper hyper elastic model is important. For high damping rubber, no general constitutive law was previously established. In this paper, we propose a new elastic-plastic constitutive law for high damping rubber. The constitutive law shows the stress relaxation depending on the deformation history and the creep-like behavior though it does not depend on the time. We simulate the high damping laminated rubber bearing under horizontal biaxial loading using the elastic-plastic model to check the validity of it, and predict the behavior of high damping laminated rubber bearings under real earthquakes.