Abstract
This paper describes a sliding friction model for an electro-deposited coating. Reciprocating sliding tests using ball-on-flat plate test apparatus are performed to determine an evolution of the kinetic friction coefficient. The evolution of the friction coefficient is classified into the initial running-in period, steady-state sliding, and transition to higher friction. The friction coefficient during the initial running-in period and steady-state sliding is expressed as a simple linear function. The friction coefficient in the transition to higher friction is described with a mathematical model derived from Kachanov-type damage law. The model parameters are then estimated using the Markov Chain Monte Carlo (MCMC) approach. It is identified that estimated friction coefficients obtained by MCMC approach are in good agreement with measured ones.
Highlights
The kinetic friction coefficient is one of informative quantities describing contact degradation between two bodies
The change rate of the friction coefficient varied with respect to number of cycles
It was possible to describe the friction coefficient during the running-in period and a steady-state sliding with a linear function
Summary
The kinetic friction coefficient is one of informative quantities describing contact degradation between two bodies. A fretting model based on Kachanov-type damage law was proposed for describing a friction coefficient change in the transition [4]. It is necessary to identify a slip regime, since contact damage varies with a relative displacement between two bodies [5,6]. Parameters such as slip ratio, slip index, and energy ratio were proposed to identify the transition between slip regimes [7,8]. An energy ratio, defined as dissipated energy divided by total energy in a fretting loop, force, was proposed for criterion of the transition between partial gross slipbetween regimes.
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