On the effect of environmental temperature on fracture fatigue entropy
On the effect of environmental temperature on fracture fatigue entropy
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DOI：
10.1016/j.ijfatigue.2022.107411
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发表时间：
2022-12-01
影响因子：
6
通讯作者：
Khonsari, M. M.
中科院分区：
文献类型：
--
作者：
Amooie, Mohammad A.;Khonsari, M. M.
研究了1018碳钢在低温环境下的断裂行为。具体而言，完全反向弯曲实验测试进行检查的有效性，应用断裂疲劳熵（FFE）的概念，预测在不同的环境温度下的疲劳寿命。建造了一个大型冷却室，容纳整个弯曲试验台，并将环境温度保持在所需的值，低至-10摄氏度。结果表明，在测试条件下，疲劳寿命提高在较低的工作温度。结果还表明，FFE几乎保持不变，可以用于可靠的疲劳寿命预测。提供了说明性的例子，以显示实用的预测目的的方法。
Fracture behavior of carbon steel 1018 operating in low-temperature environments is investigated. Specifically, fully-reversed bending experimental tests are performed to examine the efficacy of applying the concept of Fracture Fatigue Entropy (FFE) for predicting fatigue life at different environmental temperatures. A large cooling chamber was constructed that houses the entire bending test rig and maintains the environmental temperature at the desired value down to-10 degrees C. It is shown that under conditions tested, fatigue life improves at lower operating temperatures. Results also reveal that FFE remains nearly constant and can be used for reliable prediction of fatigue life. Illustrative examples are provided to show the utility of the approach for prediction purposes.