| 基于DFR法的Al-Li-S4铝锂合金铆接结构疲劳可靠性分析 |
| |
| 引用本文： | 陈安,许飞,闫文伟,董登科.基于DFR法的Al-Li-S4铝锂合金铆接结构疲劳可靠性分析[J].航空工程进展,2016,7(1):101-105. |
| |
| 作者姓名： | 陈安 许飞 闫文伟 董登科 |
| |
| 作者单位： | 中国飞机强度研究所三室 ,西安,710065 |
| |
| 摘 要： | Al-Li-S4是新一代铝锂合金,常被用作机身材料,而铆接结构在飞机各个重要受力结构中也具有广泛的应用.为了研究Al-Li-S4铝锂合金铆接结构的疲劳性能,通过试验统计得到两种铆接结构的细节疲劳额定值(DFR),并借助扫描电镜观察其疲劳裂纹的萌生和扩展行为.结果表明:Al-Li-S4铝锂合金铆接搭接结构的DFR值为102.24 MPa,铆钉填充锪窝孔连接结构的DFR值为169.41 MPa;Al-Li-S4铝锂合金疲劳断口的分析表征其具有良好的抗疲劳损伤性能.研究结果可为新型民用飞机选材、疲劳设计和寿命评估提供参考.
|
| 关 键 词： | 细节疲劳额定值 Al-Li-S4铝锂合金 铆接结构 疲劳断口 |
| 收稿时间： | 2015/12/23 0:00:00 |
| 修稿时间： | 2016/1/12 0:00:00 |
Fatigue Reliability Analysis of Al-Li-S4 Riveted Joints Based on Detail Fatigue Rating |
| |
| chenan,xuefei,yanweiwen and dongdengke.Fatigue Reliability Analysis of Al-Li-S4 Riveted Joints Based on Detail Fatigue Rating[J].Advances in Aeronautical Science and Engineering,2016,7(1):101-105. |
| |
| Authors: | chenan xuefei yanweiwen and dongdengke |
| |
| Institution: | Aircraft Strength Research Institute of China,Aircraft Strength Research Institute of China,Aircraft Strength Research Institute of China,Aircraft Strength Research Institute of China |
| |
| Abstract: | The fatigue performance of Al-Li-S4 aluminum-lithium alloys with two riveted joints is investigated. The detail fatigue rating (DFR) values are measured and calculated based on the fatigue tests. The fatigue crack initiation and propagation behavior are observed by scanning electron microscopy. The results indicate that DFR value of Al-Li-S4 alloy with riveted lap joins is 102.24MPa, and the DFR value of rivet-filled countersink hole structure is 169.41MPa. Fatigue fractography shows that Al-Li-S4 alloy has superior fatigue properties. The study can be used to select suitable materials from the fatigue strength design and fatigue life evaluation of the civil aircraft. |
| |
| Keywords: | Detail fatigue rating (DFR) Al-Li-S4 aluminum-lithium alloys riveted joints fatigue fractography |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《航空工程进展》浏览原始摘要信息 |
| 点击此处可从《航空工程进展》下载免费的PDF全文 |
