钛合金结构干涉配合铆接疲劳试验研究  

Research on Fatigue Experimental of Interference Fit Riveting of Titanium Alloy Structure

作　　者：陈允全[1] 曹增强[2] 秦龙刚[1] 陈丽丽[1] 严厉[1] CHEN Yunquan;CAO Zengqiang;QIN Longgang;CHEN Lili;YAN Li(AVIC Chengdu Aircraft Industrial (Group) Co.,Ltd.,Chengdu 610000, China;School of Mechanical Engneerng, Northwestern Polytechnical University,Xian 710000, China)

机构地区：[1]中航工业成都飞机工业(集团)有限公司,成都610000 [2]西北工业大学机电学院,西安710072

出　　处：《航空制造技术》2017年第4期83-86,共4页Aeronautical Manufacturing Technology

基　　金：航空基金2015ZE53065资助

摘　　要：干涉配合能提高接头疲劳寿命,已成为目前最有效的强化工艺方法之一。国内外飞机制造中已广泛应用干涉配合,但我国目前飞机制造中的干涉配合铆接只限于铝合金结构。钛合金优越的性能使其在飞机结构中的应用比例大幅提高,但钛合金结构的干涉配合铆接在我国飞机制造中还是一个空白。针对某型机的实际结构对钛合金结构的干涉配合铆接疲劳性能进行了试验研究。研究结果表明,较普通铆接干涉配合铆接可明显提高接头疲劳寿命,加载的应力水平越低,疲劳寿命提高越明显。另外,钉孔间隙等工艺参数对疲劳寿命增益也有较大影响。Interference-fit is a well-known technique for improving the fatigue life of joints,which has been widelyadopted in aerospace manufacturing industry.The excellent performance of titanium alloy has greatly improved its applicationin aerospace structures.However,interference-fit riveting in our country is still limited to aluminum alloy structures,there is few studies on the interference-fit riveting in titanium structures.Fatigue experiments were carried out on titaniumstructures with different interference-fit levels in this paper.It was found that interference-fit riveting can greatly improvethe fatigue life of joints compared with conventional riveting.The increment of fatigue life by interference-fit riveting becomesmore obvious at lower level loads.Processing parameters,such as the gap between hole and pin,also have great effectson the fatigue life.

关 键 词：钛合金结构 干涉配合 疲劳寿命 铆接 干涉量 

分 类 号：V252.2[一般工业技术—材料科学与工程]