Fatigue life of Simplex P bone cement was tested at three different stress amplitudes by using specimens produced by two different mixers. Fatigue life data showed high variability in all instances. Statistical analysis showed that fatigue life was not affected by the type of mixer. Analysis of fracture surfaces showed that fatigue life variability could be attributed to the presence of defects, such as bubbles and mixing defects. Both Weibull and Tiryakioğlu distributions provided excellent fits to the fatigue life data. Moreover, the Gumbel parameters for fatigue initiator size data estimated in the Tiryakioğlu distribution agreed closely with fractographic measurements.

中文翻译：

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骨水泥疲劳寿命变异性研究

Simplex P 骨水泥的疲劳寿命通过使用由两种不同混合器生产的试样在三种不同的应力幅度下进行测试。疲劳寿命数据在所有情况下都显示出高度可变性。统计分析表明，疲劳寿命不受混合器类型的影响。断口分析表明疲劳寿命可变性可归因于缺陷的存在，例如气泡和混合缺陷。Weibull 和 Tiryakioğlu 分布都为疲劳寿命数据提供了极好的拟合。此外，在 Tiryakioğlu 分布中估计的疲劳引发器尺寸数据的 Gumbel 参数与断层测量非常一致。