Abstract
In this study, thermodynamic entropy generation is employed as a degradation model for analysis of metal fatigue failure. An analytical solution is carried out to evaluate the temperature of the specimen during the test. Based on the analytical solution, two new models are developed for entropy generation. The first one is applicable to the case that plastic work density is measurable. The second one is useful for temperature monitoring techniques. A set of experiments are conducted on specimens Al 2024-T4 as a case study. The results show that cumulative entropy generation increases with respect to the number of cycles.
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