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用桥式试样研究了接触压力、微动幅度、温度、循环次数、高低周载荷幅值比等参数对微动疲劳寿命影响。结果表明拉应力和法向压力均影响微动疲劳寿命。当拉应力较大时，微动疲劳寿命（ＦＦＬ）与普通疲劳寿命（ＰＦＬ）相差不大，法向压力的影响不明显；拉应力较小时，ＦＦＬ显著低于ＰＦＬ，且法向影响显著。ＦＦＬ随法向压力增加而降低，但当超过２００ＭＰａ后，反而提高。高低周幅值比的增加，ＦＦＬ大幅度降低。当幅值比为０．１２５，从室温到４５０℃，ＰＦＬ持续降低。而ＦＦＬ从室温到２００℃降低幅度较大，在３００℃左右恢复，随后又降低。研究表明ＦＦＬ的恢复是微动表面形成了防护性釉质层的结果。
The influence of contact pressure, fretting amplitude, temperature, number of cycles and amplitude ratio of high and low circumferential loads on the fretting fatigue life was investigated by using bridge specimens. The results show that both tensile stress and normal pressure affect fretting fatigue life. When the tensile stress is large, the fretting fatigue life (FFL) is almost the same as the normal fatigue life (PFL), and the influence of the normal pressure is not obvious. When the tensile stress is small, the FFL is significantly lower than that of the PFL, and the normal impact is significant. FFL decreases with increasing normal pressure, but increases above 200 MPa. High and low weekly amplitude ratio increases, FFL significantly reduced. When the amplitude ratio is 0.125, from room temperature to 450 ℃, PFL continues to decrease. The FFL from room temperature to 200 ℃ to reduce the larger, at about 300 ℃ recovery, and then reduced. Studies have shown that the restoration of FFL is the result of a protective enamel layer formed on the fretting surface.