温度对碳纤维平纹布正交层合板拉伸疲劳性能的影响

doi:10.11896/cldb.20070259

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Abstract The fatigue performance of composites decreases with the temperature increase. The effect of temperature should be considered when determining the composite structure life. In this paper, the tensile fatigue properties of orthotropic composite laminates in CTD, RTD and ETD environment were tested. The S-N curves in three environments were obtained, and the influence of temperature on fatigue properties of composite was analyzed. Based on experimental results, the fatigue finite element model (FEM) of composite under the temperature condition was established to simulate the fatigue life and damage mechanism. The linear fitting fatigue results show that the maximum fatigue stress in CTD environment is a little smaller than that in RTD environment, while the maximum fatigue stress in ETD environment is obvious less than that in RTD environment. In CTD environment, the fracture surface of fatigue failure is relatively neat, the fiber is basically broken at the same longitudinal position, and the matrix near the fracture surface is relatively intact. The degree of fracture is very low, and there is no delamination; In RTD environment, there is no obvious delamination at the fracture surface of the specimen; In ETD environment, there is obvious delamination along the thickness with fibers pulled out and serious matrix cracks. The FEM analysis shows that the fatigue failure of the specimen is brittle fracture under CTD environment, which shows flat fracture section and narrow fracture area, while the fracture section is not smooth and uniform with relatively wider fracture area under RTD and ETD environments.

Key words： carbon fiber composite orthogonal laminate temperature fatigue damage

Published: 07 September 2021

CLC number:	V214.8
	TB332

Fund:Aeronautical Science Foundation of China (ASFC-201941067001).

About author:: Kun Chengraduated from Nanjing University of Aeronautics and Astronautics in November 2014 with a doctorate in engineering. Since working in the School of Airworthiness, Civil Aviation University of China in March 2015, he is mainly engaged in the research of aviation structural strength and airworthiness technology.
Zhenyu Feng, professor of Civil Aviation University of China. His Ph.D. degree obtained from solid mecha-nics engineering from Northwestern Polytechnical University in 1995. He focuses on the research of compo-site materials fatigue and structural impact dynamics experiment and simulation technology, and has published more than 20 articles in important domestic and foreign journals. He has presided over and participated in more than 20 national, provincial and ministerial projects.

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	CHEN Kun
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	FENG Zhenyu

Cite this article:

CHEN Kun,ZHANG Xianglin,AN Ziqian, et al. Effect of Temperature on Fatigue Properties of Carbon Fiber Orthogonal Composite Laminates[J]. Materials Reports, 2021, 35(16): 16195-16200.

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http://www.mater-rep.com/EN/10.11896/cldb.20070259 OR http://www.mater-rep.com/EN/Y2021/V35/I16/16195

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