Page 123 - 《摩擦学学报》2021年第5期
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712 摩 擦 学 学 报 第 41 卷
(a)
Tension Servo electric
Tension Loading wire transducer cylinder
transducer fixtures
Fatigue
wire
Fretting
direction
Laser displacement
transducer
Ball linear guide
Guide pulley
Contact load
Fatigue wire
(b) Loading wires
Fixed Fatigue load
Δx
F
Contact load
(c) (d)
F tmax
Tangential force/N Cycles
0.8F tmax
0.8F tmin
F tmin
Fig. 1 (a) Fretting fatigue test rig; (b) working principal of test rig; (c) structure diagram of loading wire fixture;
(d) calculation method of coefficient of friction
图 1 (a) 微动疲劳试验机; (b) 试验台工作原理; (c)加载钢丝夹具结构图; (d) 摩擦系数计算方法
500 Major axis
Dimensions of wear scar profiles/µm 300
Minor axis
400
200
100
0
5 000 10 000 20 000 30 000 40 000 50 000
Fretting fatigue cycles
(a) Wear scar profile (b) Dimensions of wear scar profiles
Fig. 2 Morphology of wear scar profile and dimensions of wear scar profiles of fatigue wires at distinct fatigue cycles
图 2 钢丝磨痕轮廓形貌和不同疲劳周次疲劳钢丝磨痕轮廓尺寸
