Fatigue Damage Evaluation of Aluminum Alloy Based on Energy Degradation

Through inngle direction tensile testing for LY12CZ alumnnum alloy at three different stress levels， the energy degradation was found to be closely related to the material damage. So based on the viewpcint of energy， a new method was proposed to evaluate fatigue damage of alumnnum alloy， which ls promlrnng for fatigue life prediction of aircraft alumnnum alloy structure.