Investigation of subsurface fatigue crack in PEEK shaft under one-point rolling contact by using 2.5D layer observation method
Investigation of subsurface fatigue crack in PEEK shaft under one-point rolling contact by using 2.5D layer observation method
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2.5D层状观察法研究单点滚动接触下PEEK轴的次表面疲劳裂纹
DOI：
10.1051/matecconf/201713009001
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发表时间：
2017
影响因子：
--
通讯作者：
KIDA Katsuyuki
中科院分区：
文献类型：
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作者：
KOIKE Hitonobu;YAMAGUCHI Genya;MIZOBE Koshiro;KASHIMA Yuji;KIDA Katsuyuki
研究了在化学环境等特殊情况下，PEEK轴与氧化铝轴承球滚动接触区域的亚表面疲劳裂纹。为了探索PEEK轴的剥落过程，在单点径向加载滚动接触机上进行了滚动接触疲劳试验。在4 × 105次疲劳循环时，PEEK轴的滚动轨迹发生了剥落。采用2.5维分层观察法研究了合金的亚表面疲劳裂纹扩展。剥落是由表面裂纹和亚表面剪切裂纹的扩展引起的，剥落形状为半椭圆形。此外，在剥落过程中还观察到疲劳裂纹扩展的滩痕。
Subsurface fatigue cracks under rolling contact area of the PEEK shaft against an alumina bearing’s ball were investigated for application of frictional part in mechanical element in special situations such as chemical environments. In order to explore the flaking process of the PEEK shaft, the rolling contact fatigue tests were carried out by using a one-point radial loading rolling contact machine. The flaking occurred on the rolling track of the PEEK shaft at approximate 4⨉105fatigue cycles. The subsurface fatigue crack propagation was investigated by using 2.5-Dimension layer observation method. The flaking was caused by the propagations of surface cracks and subsurface shear cracks, and the flaking shape was half-ellipse. Moreover, beach marks as fatigue crack propagation in the flaking were observed.