纤维增强铝锂合金层板不同加载方式下的疲劳性能

doi:10.12068/j.issn.1005-3026.2017.05.017

东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (5): 690-694.DOI: 10.12068/j.issn.1005-3026.2017.05.017

纤维增强铝锂合金层板不同加载方式下的疲劳性能

孟维迎¹，谢里阳¹，刘建中²，佟安时¹

(1. 东北大学机械工程与自动化学院，辽宁沈阳110819; 2. 北京航空材料研究院，北京100095)

收稿日期:2015-12-16 修回日期:2015-12-16 出版日期:2017-05-15 发布日期:2017-05-11
通讯作者: 孟维迎
作者简介:孟维迎(1987-)，男，辽宁锦州人，东北大学博士研究生；谢里阳(1962-)，男，安徽岳西人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金重点资助项目 (51335003); 辽宁重大装备制造协同创新中心资助项目.

Fatigue Properties of Fiber Reinforced Al-Li Alloy Laminates Under the Conditions of Different Loading Modes

MENG Wei-ying¹， XIE Li-yang¹， LIU Jian-zhong²， TONG An-shi¹

1. School of Mechanical Engineering & Automation， Northeastern University， Shenyang 110819， China; 2. Beijing Institute of Aeronautical Materials， Beijing 100095， China.

Received:2015-12-16 Revised:2015-12-16 Online:2017-05-15 Published:2017-05-11
Contact: XIE Li-yang
About author:-
Supported by:
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摘要/Abstract

摘要：

对纤维增强铝锂合金2/1层板及3/2层板材料进行疲劳寿命试验，通过对每种材料试样施加不同循环特征的循环应力(恒幅循环应力，应力比为R=-1;高-低加载，Mini-Twist谱载)，共获得了6种应力-寿命试验数据.使用样本信息聚集原理，拟合出了各材料的P-S-N曲线.通过比较相同加载方式不同材料的S-N曲线的差异，对比分析了不同复合结构的材料疲劳性能的特点.结果表明:在5×10⁴~5×10⁵寿命范围内，恒幅R=-1及高-低加载载荷下，纤维增强铝锂合金3/2层板疲劳寿命性能均优于2/1层板;Mini-Twist谱载下，纤维增强铝锂合金3/2层板的疲劳性能总体上也优于2/1层板.

关键词: 纤维增强铝锂合金层板, 疲劳试验, 循环应力, 不同加载方式, 疲劳性能

Abstract:

The 2/1 laminates and 3/2 laminates of fiber reinforced Al-Li alloy were taken for fatigue life tests. Each type of the materials was applied to cyclic stress， which has different cycle characteristics (constant amplitude with the stress ratio -1， high and low load and Mini-Twist spectrum load). Six kinds of test data on stress life were obtained and the P-S-N curve of each material was fitted by using the principle of sample polymerization. The S-N curve differences of varied materials in the same loading mode were compared with each other in order to analyze the fatigue performance characteristics of the materials with different compounding patterns. The results showed that in the range of 5×10⁴~5×10⁵ life， the fatigue life performance of 3/2 laminate materials is better than that of 2/1 laminates under constant amplitude and high and low load; and the fatigue life performance of 3/2 laminate materials is superior to that of 2/1 laminates on the whole under Mini-Twist spectrum load.

Key words: fiber reinforced Al-Li alloy laminates, fatigue test, cyclic stress, different loading modes, fatigue performance

中图分类号:

V257

孟维迎，谢里阳，刘建中，佟安时. 纤维增强铝锂合金层板不同加载方式下的疲劳性能[J]. 东北大学学报:自然科学版, 2017, 38(5): 690-694.

MENG Wei-ying， XIE Li-yang， LIU Jian-zhong， TONG An-shi. Fatigue Properties of Fiber Reinforced Al-Li Alloy Laminates Under the Conditions of Different Loading Modes[J]. Journal of Northeastern University:Natural Science, 2017, 38(5): 690-694.

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纤维增强铝锂合金层板不同加载方式下的疲劳性能

Fatigue Properties of Fiber Reinforced Al-Li Alloy Laminates Under the Conditions of Different Loading Modes

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