Flaking of PEEK under one-point rolling contact fatigue using Al2O3 ball
Flaking of PEEK under one-point rolling contact fatigue using Al2O3 ball
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Al2O3 球在单点滚动接触疲劳下 PEEK 的剥落
DOI：
10.1051/matecconf/201926401004
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发表时间：
2019
影响因子：
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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;KIDA Katsuyuki
通过加工聚醚醚酮聚合物轴与氧化铝轴承滚珠的一点滚动接触疲劳试验，研究了聚醚醚酮中剥落作为摩擦学疲劳失效的扩展规律。由于循环压应力的赫兹接触，PEEK轴次表面疲劳裂纹沿滚动和轴向扩展。当PEEK轴的滚动疲劳寿命达到106次疲劳循环时，在滚动轨道的近表面出现了许多窄角裂纹，没有剥落。另一方面，当PEEK轴在106次疲劳循环之前发生剥落时，观察到半圆形表面和亚表面裂纹的扩展。从这些观察中发现，由于亚表面和表面裂纹之间的联系，产生了微观剥落。剥落是由于这些微剥落的积累而形成的。
The growth of flaking as tribological fatigue failure in PEEK was investigated through the one-point type rolling contact fatigue test between a machined PEEK polymer shaft and an alumina bearing's ball. Due to Hertzian contact of cyclic compressive stress, the subsurface fatigue cracks in the PEEK shaft propagated in rolling and axial directions. When the rolling fatigue life of the PEEK shaft reached 106fatigue cycles, many narrow angled cracks occurred in the near-surface of the rolling track without flaking. On the other hand, when the flaking ocuurred on the PEEK shaft before 106fatigue cycles, semicircular surface and subsurface crack propagations were observed. From these observations, it was found that micro-flaking occurred due to the linkages between subsurface and surface cracks. Flakingdeveloped due to the accumulation of these micro-flakings.