Torsional Fatigue Strength of a Shrink Fitted Shaft
Torsional Fatigue Strength of a Shrink Fitted Shaft
复制标题
热压配合轴的扭转疲劳强度
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
Sonobe Tadashi
中科院分区：
文献类型：
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作者：
T. Hattori;S. Kawai;N. Okamoto;Sonobe Tadashi
根据应力分析结果，考虑了摩擦系数和接触压力在循环载荷作用下的变化，估算了几种过盈配合联轴器的扭转疲劳强度。然后，这些估计的强度证实了扭转疲劳试验。结果总结如下。滑移区摩擦系数随循环次数的增加而稳定增加，并在104次以上达到饱和。其饱和值约为0.7。热套轴的扭转疲劳强度折减系数Kf=1.28，远小于旋转弯曲疲劳强度折减系数Kf=2 × 3。凹槽、锥度等抗微动措施对扭转疲劳的抗微动效果不如对旋转弯曲疲劳的抗微动效果好。
Torsional fatigue strength of several types of shrink fitted shaft couplings is estimated based on the results of stress analysis, in which the changes of frictional coefficient and contact pressure during cyclic loading are taken into account. Then these estimated strengths are confirmed by torsional fatigue tests. The results are summarized as follows. The firictional coefficient in the slip region increases steadily with an increase of cycles and saturates for more than 104 cycles. The saturated value of it is about 0.7. Torsional fatigue strength reduction factor of shrink fitted shaft is found to be Kf=1.28, which is far smaller than the rotational bending fatigue strength reduction factor (Kf=2∼3). Anti-fretting measures such as groove, taper are found to be not so effective for torsionalfatigue as for rotational bending fatigue.