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首页> 美国卫生研究院文献>Materials >Effects of Loading Frequency and Loading Type on High-Cycle and Very-High-Cycle Fatigue of a High-Strength Steel
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Effects of Loading Frequency and Loading Type on High-Cycle and Very-High-Cycle Fatigue of a High-Strength Steel

机译：加载频率和加载类型对高强度钢高周疲劳和超高周疲劳的影响

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摘要

High-cycle and very-high-cycle fatigue tests via rotary bending (52.5 Hz), electromagnetic resonance (120 Hz) axial cycling, and ultrasonic (20 kHz) axial cycling were performed for a high-strength steel with three heat treatment conditions, and the effects of loading frequency and loading type on fatigue strength and fatigue life were investigated. The results revealed that the loading frequency effect is caused by the combined response of strain rate increase and induced temperature rise. A parameter η was proposed to judge the occurrence of loading frequency effect, and the calculated results were in agreement with the experimental data. In addition, a statistical method based on the control volume was used to reconcile the effect of loading type, and the predicted data were consistent with the experimental results.
机译：针对具有三种热处理条件的高强度钢，通过旋转弯曲（52.5 Hz），电磁共振（120 Hz）轴向循环和超声波（20 kHz）轴向循环进行了高循环和超高循环疲劳测试，研究了加载频率和加载类型对疲劳强度和疲劳寿命的影响。结果表明，加载频率效应是由应变率增加和引起的温度上升的综合响应引起的。提出了参数η来判断加载频率效应的发生，计算结果与实验数据吻合。另外，采用基于控制量的统计方法来调和加载类型的影响，预测数据与实验结果一致。

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