Recorded brake evaluation tests in automobiles and in a dual-brake inertia dynamometer show continual transfer of torque among the several brakes. The individual brakes seldom exert the designed relative braking torque, because the coefficient of friction is seldom the same in each. Experimental results are given to show torque transfer caused by fade following high temperatures and by recovery following lowered temperatures and wear. Differential equations are derived expressing the decrease in coefficient of friction (fade) as a function of time and the temperature rise induced by frictional work. The solutions show torque transfer similar to that observed.
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References
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