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在低循环疲劳试验中，同一应变水平下的试样表面温升及控制应变速率随加载频率增加而升高。在某一较高的频率范围内，疲劳寿命与加载频率及试样温升几乎无关，但当频率低于某一值时，疲劳寿命则有下降的趋势，如若试验在较高频率下进行，而后对疲劳寿命再做适当修正，也可得低频率下的疲劳寿命，这可明显地提高工效，节省费用，具有重要的现实意义。
In the low cycle fatigue test, the temperature rise and the controlled strain rate of the specimen at the same strain level increase with the increase of the loading frequency. In a certain high frequency range, the fatigue life is almost independent of the loading frequency and the temperature rise of the specimen, but the fatigue life tends to decrease when the frequency is lower than a certain value. If the test is conducted at a higher frequency, Then the fatigue life to do the appropriate re-amendment, but also available under low-frequency fatigue life, which can significantly improve work efficiency, save costs, with important practical significance.