Fatigue Behavior of Composite Sandwich Panels Under Three Point Bending Load

被引：25
|
作者：
Ma, Mingze [1 ]
Yao, Weixing [2 ]
Jiang, Wen [1 ]
Jin, Wei [3 ]
Chen, Yan [3 ]
Li, Piao [1 ]
机构：
[1] Nanjing Univ Aeronaut & Astronaut, State Key Lab Mech & Control Mech Struct, Nanjing 210016, Peoples R China
[2] Nanjing Univ Aeronaut & Astronaut, Key Lab Fundamental Sci Natl Def Adv Design Techn, Nanjing 210016, Peoples R China
[3] Chengdu Aircraft Design Inst, Struct Strength Dept, Chengdu 610092, Peoples R China
来源：
POLYMER TESTING | 2020年 / 91卷
关键词：
Composite sandwich panels; Fatigue damage; Fatigue failure mode; Micro cracks; Life prediction; BEAMS;
D O I：
10.1016/j.polymertesting.2020.106795
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
In this paper, the bending fatigue tests of honeycomb sandwich panels are carried out by using an improved three-point bending test fixture, and the S-N curves at different stress ratios are obtained. Through the records of fatigue damage in the experiment, the failure mode of the honeycomb sandwich panels and the source of fatigue damage are determined. At the same time, through the calculation of the shear stress distribution on the honeycomb wall, the reasons for the difference in the failure morphology of the L-direction and W-direction sandwich panels are clarified. Besides, a life prediction method is proposed and its effectiveness in predicting the fatigue life of sandwich panels has been verified.
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收藏
页数：8
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