A fretting fatigue tester for steel wires and its measuring system

A self-made fretting fatigue tester for steel wire based on the computer-controlled electro-hydraulic servo fatigue testing machine is introduced in the paper. The working principle and experimental method are described. The signals of contact load, fretting tangential force and fretting amplitude are collected using force and displacement sensors. Synchronous acquisition and dynamic display of the signals of various parameters are realized using the dynamic signal analyzer. The friction coefficient curve is obtained by processing the signals of various parameters using MATLAB software as well as the change curve of fretting tangential force with the fretting amplitude in different fretting cycles. The tester for steel wires is applied to study the mechanism of fretting fatigue, fretting fatigue life and fretting running regime characteristics.