Friction and friction heat of micronscale iron

TL;DR

This study uses smoothed particle hydrodynamics simulations to analyze how velocity and temperature affect friction and heat generation in micronscale iron, revealing stable friction coefficients and temperature behaviors.

Contribution

It provides new insights into the velocity and temperature dependence of friction and heat in micronscale iron through detailed simulation analysis.

Findings

Friction coefficient stabilizes around 0.3 at ~50 m/s.

Friction heat and temperature rise follow sigmoidal functions over sliding time.

Friction layer exhibits the highest temperature and largest temperature increase.

Abstract

The paper investigates friction and friction heat of the micronscale iron under influences of velocity of the slider and temperature of the substrate by using smoothed particle hydrodynamics simulations. In the velocity range of 10 - 100 m/s, change of friction coefficient via velocity well complies with exponent or hyperbolic tangent form and friction coefficient begins to approach a stable value of 0.3 at around a velocity of 50 m/s after a rapidly increasing situation. Friction coefficient steady maintains over the temperature range of 200 - 400 K at each velocity of 10, 50 or 100 m/s. Friction heat is detailed analyzed via sliding time. Change of temperature of the system via sliding time well complies with sigmoidal functions, an exception of that of the particle layer directly causing friction. The layer causing friction has the highest steady temperature and its temperature rise is the largest one. The temperature rise is found to be dependent on increment of the initial temperatures of the substrate and the slider while the incnt does not efect on configration of the slid time - temperature curve