Remaining Life Evaluation for LY12CZ Based on Non-Linear Continuum Fatigue Damage Model

摘要

Chaboche's model of nonlinear continuum fatigue damage is modified based on the impact of crack closure effect on fatigue damage. A cumulative fatigue damage model is developed accordingly to predict the remaining life for condemned products to be remanufactured. The related parameters are concluded from fully reversed fatigue experiment of LY12CZ. To verify the proposed model, tension-compression fatigue tests of LY12CZ under two levels of load spectrum(high-low loading and low-high loading) are carried out. The results showed that the calculated value and fatigue experimental value of LY12CZ are in good agreement. It has been proved to be an efficient method to predict the remaining life involved in remanufacturing technology.