Two-dimensional FrBD friction models for rolling contact

TL;DR

This paper introduces a comprehensive two-dimensional FrBD friction model for rolling contact, capturing complex slip and spin phenomena, with theoretical analysis and numerical simulations demonstrating its stability and applicability.

Contribution

It extends the FrBD framework to two dimensions, providing a fully dynamic, mathematically tractable model for diverse rolling contact scenarios.

Findings

Model preserves passivity under practical parameters.

Numerical simulations show steady-state and transient behaviors.

The formulation covers linear and semilinear rolling with large spin slips.

Abstract

This paper develops a comprehensive two-dimensional generalisation of the recently introduced Friction with Bristle Dynamics (FrBD) framework for rolling contact problems. The proposed formulation extends the one-dimensional FrBD model to accommodate simultaneous longitudinal and lateral slips, spin, and arbitrary transport kinematics over a finite contact region. The derivation combines a rheological representation of the bristle element with an analytical local sliding-friction law. By relying on an application of the Implicit Function Theorem, the notion of sliding velocity is then eliminated, and a fully dynamic friction model, driven solely by the rigid relative velocity, is obtained. Building upon this local model, three distributed formulations of increasing complexity are introduced, covering standard linear rolling contact, as well as linear and semilinear rolling in the presence of large spin slips. For the linear formulations, well-posedness, stability, and passivity properties are investigated under standard assumptions. In particular, the analysis reveals that the model preserves passivity under almost any parametrisation of practical interest. Numerical simulations illustrate steady-state action surfaces, transient relaxation phenomena, and the effect of time-varying normal loads. The results provide a unified and mathematically tractable friction model applicable to a broad class of rolling contact systems.