预腐蚀LY12CZ铝合金的疲劳寿命预测模型  

Fatigue Life Prediction Model of Pre-corroded LY12CZ Aluminium Alloy

作　　者：穆志韬[1] 孔光明[1] 李旭东[1] 

机构地区：[1]海军航空工程学院青岛校区,山东青岛266041

出　　处：《装备环境工程》2014年第4期16-20,共5页Equipment Environmental Engineering

摘　　要：目的研究铝合金预腐蚀疲劳的寿命评估模型。方法利用损伤力学模型,建立预腐蚀构件疲劳寿命预测模型,并利用LY12CZ铝合金进行预腐蚀疲劳的验证性实验。结果利用损伤力学建立的模型所得到的预腐蚀铝合金试件的疲劳寿命与实验结果吻合程度良好。结论基于损伤力学的铝合金预腐蚀疲劳寿命预测模型合理有效。Objective To study the evaluation method of fatigue life of pre-corroded aluminum alloy. Methods By means of damage mechanics,a theoretical model for fatigue life prediction of pre-corroded parts was established,and precorrosion fatigue experiment was conducted on LY12 CZ aluminum alloy to verify the accuracy of the proposed model.Results Experimental results of the fatigue life of pre-corroded aluminum alloy parts were in good agreement with the predictions of the proposed model established based on damage mechanics. Conclusion The proposed model based on damage mechanics was reasonable and effective in predicting the fatigue life of pre-corroded aluminum alloy.

关 键 词：LY12CZ铝合金 预腐蚀 疲劳寿命 损伤演化 

分 类 号：TG171[金属学及工艺—金属表面处理] V252[金属学及工艺—金属学]