BFRP筋温度损伤后的疲劳性能研究

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Abstract The fatigue property of basalt fiber reinforced composites (BFRP) with cumulative thermal damage was studied, which is of great significance for its proper use under high temperature condition.An improved Single Point Group method was proposed to do a regressive analysis on a three-parameter expression of the fatigue S-N curve.The gray theory GM (1,1) model and the extreme value principle were introduced to derive a three-parameter Weibull probability density function varying with corresponding stress level, and the distribution parameters were determined by the maximum likelihood estimation method.A Weibull probabilistic fatigue T-P-S-N model was established through the nonliear fitting, considering the comprehensive effect of temperature and reliability, which was then validated by using the fatigue test of a high temperature affected BFRP bar.The results demonstrate that the downtrend of fatigue life of BFRP bar can be apparently observed when the external temperature and reliability ascend, which corresponds well to the practical situation.The proposed model is able to properly describe the trend of fatigue behavior of BFRP with varied temperature and reliability.

Key words： BFRP bar temperature damage fatigue reliability T-P-S-N model

Received: 07 November 2018 Published: 28 April 2020

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	Articles by authors
	KUANG Jinxin1
	ZHANG Chuntao1
	HAO Zhiming2

Cite this article:

KUANG Jinxin1,ZHANG Chuntao1,HAO Zhiming2. Fatigue properties of BFRP bars after temperature damage[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(9): 181-187.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I9/181

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