铝合金预腐蚀与疲劳性能灰色模型研究  

Research of Gray Model Applied in the Prior Corrosion and Fatigue of Aluminum Alloys

作　　者：刘延利[1] 钟群鹏[1] 王宇魁 

机构地区：[1]北京航空航天大学材料科学与工程系 [2]陕西飞机制造公司

出　　处：《北京航空航天大学学报》2001年第2期129-132,共4页Journal of Beijing University of Aeronautics and Astronautics

基　　金：国家重点基础研究专项经费资助项目! (G19990 6 5 0 )

摘　　要：利用等间隔和非等间隔GM(1 ,1 )模型 ,拟合并建立了模拟加速预腐蚀后铝合金的腐蚀失重、最大孔蚀深度及疲劳强度额定值与腐蚀时间的非线性关系 .结果表明 :与常用的幂函数模型相比 ,用GM(1 ,1 )模型能较好地反映铝合金腐蚀过程的变化趋势及其对疲劳性能的影响 ;无论等间隔还是非等间隔数据 ,GM(1 ,1 )模型都能较好地描述 ,并可通过残差修正模型来提高GM(1 ,1 )The effect of corrosion temperature and time on properties of the prior-corroded aluminum alloys was discussed tentatively, and gray model was introduced in the research of the simulating accelerated corrosion test for aluminum alloys. The non-linear relationship between mass loss, maximum corrosion depth, detail fatigue rating (DFR) and corrosion time was established based on power function, constant interval gray model as well as variable interval gray model. The results indicate that gray model can be employed to predict the underlying corrosion trend and fatigue properties precisely, compared with power model. No matter constant interval or variable interval data, gray model can describe successfully, and the accuracy of the gray model can also be improved by setting up modified residuals model.

关 键 词：灰色系统 疲劳 铝合金 预腐蚀 飞机 材料 

分 类 号：TG178[金属学及工艺—金属表面处理] V252.2[金属学及工艺—金属学]