Abstract
Numerical models to simulate interface behavior of friction connections under cyclic loading are investigated. The question of validity of lower order models in successfully capturing response of friction joints under cyclic loading is addressed. Single-element macroslip models are not capable of capturing localized interface behavior prior to gross interfacial slip. This paper focuses the convergence behavior of a multi-point contact microslip model comprised of Iwan-type elements for different physical parameters such as system response amplitude and kinematic state of the friction joint. It is observed that system dynamics play a significant role in determining the convergence of frictional behavior, especially for tuned damper sets. This behavior is explored using simple linearized models. In addition, the interface kinematic behavior converges at a slower rate than the structural response and therefore requires a higher-order interface model.
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