Modeling the temperature dependence of fatigue strength of metallic materials

In this study, a temperature-dependent fatigue failure criterion was proposed. A maximum energy density related to the fatigue failure of the material which is comprised of the strain energy and its equivalent heat energy was put forward at different temperatures. Two temperature-dependent fatigue strength models without fitting parameters were developed. The quantitative relationship between temperature, fatigue strength, Young's modulus, and melting point was established by the models. The model predictions were in good agreement with all the available experimental data for 17 metallic materials. A fast and simple non-destructive method for predicting temperature-dependent fatigue strength is realized in this work.

Automated summary

In this study, a temperature-dependent fatigue failure criterion was proposed and two temperature-dependent fatigue strength models without fitting parameters were developed. The model predictions were in good agreement with experimental data, demonstrating a fast and simple non-destructive method for predicting temperature-dependent fatigue strength.