Experimental Determination of Entropy and Exergy in Low Cycle Fatigue

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.