Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load

doi:10.3390/met12071181

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	Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load
	Bai, Xuezong; Wei, Xubing; Ma, Qiang; An, Zongwen
刊名	METALS
	2022-07-01
卷号	12 期号:7
关键词	failure rate fatigue life Ti-6246 alloy stress distribution
DOI	10.3390/met12071181
英文摘要	Failure rate is an important reliability index of mechanical components. Failure rate is usually used to characterize the degradation rule of material performance under the cyclic load, which is critical to fatigue life prediction as well as reliability assessment of Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) alloy. In order to reveal the probability characteristics of failure rate of Ti-6246 alloy under uncertain cyclic load, the equation of P-S-N curve is studied in this paper. Firstly. The probability density function for fatigue life under uncertain cyclic loading is derived from the probability density function for external stresses. A probabilistic model for the failure rate is then presented based on the basic assumptions. It is assumed that the failure rate and fatigue life of the material depend on the same damage state. Finally, the validity of the proposed model is verified by the Ti-6246 alloy fatigue test. The results show that the fatigue life of Ti-6246 alloy is more affected by material parameters (internal factors) than stress (external factors) under uncertain constant amplitude cyclic loading.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	MDPI
WOS记录号	WOS:000831453500001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/159437]
专题	机电工程学院
作者单位	Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Bai, Xuezong,Wei, Xubing,Ma, Qiang,et al. Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load[J]. METALS,2022,12(7).
APA	Bai, Xuezong,Wei, Xubing,Ma, Qiang,&An, Zongwen.(2022).Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load.METALS,12(7).
MLA	Bai, Xuezong,et al."Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load".METALS 12.7(2022).