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在最近十几年中,疲劳试验方法有了很大发展,其主要方面是数理统计在疲劳试验中的应用。这个时期提出的一些新的试验方法,几乎都和统计理论分不开的。产生此种情况的原因,主要是由于疲劳试验结果的分散性,这也正是疲劳试验不同于静力试验的特点之一,研究结果指出,当利用疲劳试验方法确定零构件的寿命时,名义载荷偏离实际载荷有3%的误差(对疲劳试验设备这种误差是完全允许的),就会引起60%疲劳寿命的误差。在长寿命区(例如对于比疲劳极限高5%的应力水平),3%的载荷误差其致会导
In recent ten years, fatigue test methods have made great progress, the main aspect of which is the application of mathematical statistics in fatigue tests. Some new test methods proposed during this period are almost inseparable from statistical theory. The reason for this is mainly due to the dispersion of the fatigue test results, which is also one of the characteristics of the fatigue test is different from the static test, the results indicate that when using fatigue test method to determine the life of the components, the name Load deviation from the actual load with 3% error (for fatigue test equipment this error is fully allowed), it will cause 60% of the fatigue life error. In long-lived areas (for example for stress levels 5% above the fatigue limit), a 3% load error is induced