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

doi:10.12068/j.issn.1005-3026.2017.05.017

Journal of Northeastern University:Natural Science ›› 2017, Vol. 38 ›› Issue (5): 690-694.DOI: 10.12068/j.issn.1005-3026.2017.05.017

• Mechanical Engineering • Previous Articles Next Articles

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
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Abstract

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

CLC Number:

V257

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

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