制造工艺对飞机铝锂合金结构细节疲劳性能影响研究  

Study on Influences of Manufacturing Process on Detail Fatigue Rating of Aluminum-lithium Alloy Structure

作　　者：蔡玲 CAI Ling(Shanghai Aeronautical Materials&Structures Testing Co.,Ltd.,Shanghai 201210,China)

机构地区：[1]上海飞机设计研究院,上海201210

出　　处：《机械科学与技术》2024年第3期533-539,共7页Mechanical Science and Technology for Aerospace Engineering

摘　　要：研究制造工艺(铣圆转速、孔边倒角、干涉量等)对飞机铝锂合金结构细节疲劳性能DFR的影响。结果表明:在一定铣圆转速范围内,存在最优铣圆转速;孔边倒角可以有效减轻应力集中现象,提高疲劳性能;干涉配合铆接在孔壁引入残余压应力,对孔连接具有一定强化作用,通过增加干涉量可使连接达到与整体材料相当的疲劳寿命,不再是铆接件中最薄弱“环节”。Research the effects of the milling speed on U-notch details,and chamfer and feed rate on the opening details,and interference details on DFR in aluminum-lithium alloy.The results show that in a certain range of milling speed,there is an optimal milling speed;the hole edge chamfer can effectively reduce the stress concentration and improve the fatigue performance;interference fit riveting introduces the residual compressive stress into the hole wall,which has a certain strengthening effect on the hole connection,By increasing the amount of interference,the connection can reach the fatigue life equivalent to that of the whole material,which is no longer the weakest link in riveting parts.

关 键 词：铝锂合金 细节疲劳额定值 铣切速度 孔边倒角 

分 类 号：V252.2[一般工业技术—材料科学与工程]