Investigation of metal fatigue using a coupled entropy-kinetic model

A new method is proposed to predict the fatigue life of metals based on the fracture fatigue entropy (FFE) criterion. This method enables a rapid prediction of the cyclic plastic strain energy and the temperature evolution using the concept of kinetic strength of solid materials. Theoretical predictions are compared with experiments results for Al 7075-T6, LCS 1018, API 5L X52, and MCS 1045. It is shown that this model can reliably predict the temperature evolution, plastic strain energy dissipation, and the fatigue life of metals.

Automated summary

A new method based on the fracture fatigue entropy (FFE) criterion is proposed to predict the fatigue life of metals. This method utilizes the concept of kinetic strength of solid materials to rapidly predict the cyclic plastic strain energy and temperature evolution. Experimental results for Al 7075-T6, LCS 1018, API 5L X52, and MCS 1045 are compared with theoretical predictions, demonstrating that this model can reliably predict the temperature evolution, plastic strain energy dissipation, and fatigue life of metals.