Abstract Recent works in mechanical fatigue consider that a threshold of entropy exists, the fracture fatigue entropy. In this paper, we observe the existence of a threshold of entropy and exergy in low cycle fatigue for a flat Al-2024 specimen measuring the heat generated during a fatigue test. Results are compared considering various hypotheses (1D heat dissipation with convection and radiation considered as complementary parts, and, heat transfer from a fin with convection and radiation as boundary conditions) to an empirical mechanical model known in the literature and deviations between them are discussed.

中文翻译：

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低周疲劳熵和火用的实验测定

摘要 最近的机械疲劳研究认为存在一个熵阈值，即断裂疲劳熵。在本文中，我们观察了测量疲劳试验期间产生的热量的扁平 Al-2024 试样的低周疲劳熵和火用阈值的存在。将各种假设（以对流和辐射视为互补部分的一维散热，以及以对流和辐射为边界条件从翅片传热）的结果与文献中已知的经验力学模型进行比较，并讨论了它们之间的偏差。