基于超高周三点弯曲的复合材料试验方法

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Abstract In order to solve the problem of composite`s very high cycle fatigue (VHCF), a method of three-point bending test based on ultrasonic fatigue testing device was proposed; the necessity of composite VHCF test was discussed; the modal of the horn, the connecting rod and the specimen was analyzed by ABAQUS, and the resonant frequency of the designed device as well as the specimen was satisfied.Aiming at the phenomenon of temperature rise in the experiment process, a combined cooling system of liquid nitrogen with compressed air was put forward.The results indicate that the method greatly shortens the test period, improves the test efficiency, eliminates the thermal effect of the specimen during the high frequency loading period, and ensures the validity of the experimental results.

Key words： composite three-point bending VHCF temperature rise phenomenon cooling system

Received: 19 July 2017 Published: 15 June 2019

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	CHEN Chao1
	CHEN Xuan1
	CHENG Li1
	2

Cite this article:

CHEN Chao1,CHEN Xuan1,CHENG Li1, et al. A VHCF test method based on three-point bending for composite[J]. JOURNAL OF VIBRATION AND SHOCK, 2019, 38(12): 239-245.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2019/V38/I12/239

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