Publications

Implementation and comparison of advanced friction representations within finite element models

Mathis, A.T.; Brink, Adam R.; Quinn, D.D.

Advanced friction models are often mathematically defined as nonlinear differential equations or complicated algebraic operations acting in single degree-of-freedom systems; however, such simplified conditions are not relevant to most design applications. As a result, current designers of practical structures typically simplify friction modeling to classical, Coulomb-like descriptions. In order to be viable for design purposes, friction models must be applicable to realistic structures and available in standard commercial codes. The goal of this work is to implement several different friction models into the commercial code, Abaqus, as user-defined contact models and to explore their properties in a dynamic simulation. A verification problem of interest to the joints community is utilized to evaluate efficacy. Several output quantities of the model will be presented and discussed, including frictional energy dissipation, amplitude, and frequency. The selected results are comparable to commonly observed experimental phenomena in mechanics of jointed structures.