Fundamental Investigations of Fretting Fatigue : (Part 5, The Effect of Relative Slip Amplitude)

抄録

The fact that the fretting fatigue strength is significantly influenced by the relative slip amplitude was confirmed experimentally and reported in the previous paper. In the present paper, in order to make clear why the relative slip has a marked influence upon the fretting fatigue strength, the relation between the frictional force and the relative slip is investigated experimentally. As the result, the alternating stress amplitude, σ_fw1, which is the fatigue limit based upon the initation of fatigue cracks under the condition of fretting, could be expressed in the following equation as a function of relative slip, S, σ_fw1=σ_w1-2_μp0{1-exp (-S/κ)}, where σ_w1 is the fatigue strength of plain specimen, μ is the coefficient of friction, and k is a constant.