A Multi-scale Corrosion Fatigue Damage Model of Aluminum Alloy Considering Multiple Pits and Cracks  

作　　者：Bin Sun Yang Zheng Zhaoxia Li 

机构地区：[1]Department of Engineering Mechanics,Jiangsu Key Laboratory of Engineering Mechanics,Southeast University,Nanjing 210000,China [2]Department of Information Center,The Second Affiliated Hospital of Southeast University,Nanjing 210000,China

出　　处：《Acta Mechanica Solida Sinica》2018年第6期731-743,共13页固体力学学报（英文版）

基　　金：Fundamental Research Funds for the Central Universities,Natural Science Foundation of Jiangsu Province (BK20170655,BK20170677),and the National Program on Key Research Project (2016YFC0701301-02).

摘　　要：A multi-scale model is developed to link the continuum damage variable in macroscale to the number density of multiple pits and cracks in microscale for studying the corrosion fatigue of aluminum alloy from multi-scale viewpoint.The developed model is used to predict the coherent multi-scale corrosion fatigue process of aluminum alloy component in the 3.5 wt% NaC1water solution under constant stress amplitude at a nominal frequency of 5Hz, and the numerical prediction results are compared with the experimental results.It shows that the model is effective and can be used to study the corrosion fatigue mechanisms of alurninum alloy from both macro and microscale viewpoints.

关 键 词：MULTI-SCALE CONTINUUM damage PIT Crack CORROSION fatigue Aluminum alloy 

分 类 号：O3[理学—力学]