中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 11 November 2012 |
（1. State Key Laboratory of Advanced Welding and Jointing, Harbin Institute of Technology, Harbin 150001, China;
2. Welding Process Section, Dongfang Boiler Group Co., Ltd., Zigong 643001, China）
Abstract:A non-linear continuum damage model was presented based on the irreversible thermodynamics framework developed by LEMAITRE and CHABOCHE. The proposed model was formulated by taking into account the influence of loading frequency on fatigue life. The parameters H and c are constants for frequency-independent materials, but functions of cyclic frequency for frequency-dependent materials. In addition, the expression of the model was discussed in detail at different stress ratios (R). Fatigue test data of AlZnMgCu1.5 aluminium alloy and AMg6N alloy were used to verify the proposed model. The results showed that the model possesses a good ability of predicting fatigue life at different loading frequencies and stress ratios.
Key words: AlZnMgCu1.5 alloy; AMg6N alloy; continuum damage model; cy
