Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load

doi:10.3390/met12071181

IR > 机电工程学院

	Failure Rate Model of Materials under Uncertain Constant Amplitude Cyclic Load
	Bai, Xuezong; Wei, Xubing; Ma, Qiang; An, Zongwen
	2022-07
发表期刊	METALS
卷号	12 期号:7
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.
关键词	failure rate fatigue life Ti-6246 alloy stress distribution
DOI	10.3390/met12071181
收录类别	SCIE
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000831453500001
出版者	MDPI
来源库	WOS
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/159437
专题	机电工程学院
通讯作者	An, Zongwen
作者单位	Lanzhou Univ Technol, Sch Mech & Elect Engn, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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).