A new multiaxial fatigue life prediction model considering additional hardening effect

doi:10.1177/1687814020935331

	A new multiaxial fatigue life prediction model considering additional hardening effect
	Li Bin1,3 ; Liu Jianhui2 ; Wang Xiuli1
	2020-06
发表期刊	ADVANCES IN MECHANICAL ENGINEERING
ISSN	1687-8132
卷号	12 期号:6
摘要	The established linear fatigue life prediction model based on the Miner rule has been widely applied to fatigue life prediction under constant amplitude uniaxial and multiaxial loading. Considering the physical significance of crack formation and propagation, a multiaxial equivalent linear fatigue life prediction model is put forward based on Miner rule and critical plane method under constant amplitude loading. The essence of this approach is that the equivalent strain, which consists of the shear strain and normal strain on the critical plane, replaces the relevant parameter of uniaxial nonlinear fatigue damage model. The principal axes of stress/strain rotate under non-proportional loading. Meanwhile, the microstructure of material and slip systems change, which lead to additional hardening effect. The ratio of cyclic yield stress to static yield stress is used to represent the cyclic hardening capacity of material, and the influence of phase difference and loading condition on the non-proportional hardening effect is considered. The multiaxial fatigue life is predicted using equivalent stain approach, maximum shear stain amplitude model, CXH model, and equivalent multiaxial liner model under proportional and/or non-proportional loading. The smooth and notched fatigue specimens of four kinds of materials (Q235B steel, titanium alloy TC4, Haynes 188, and Mod.9Cr-1Mo steel) are used in the multiaxial fatigue experiments to verify the proposed model. The predicted results of these materials are compared with the test results, and the results show that these four models can achieve good effect under proportional loading, but the proposed model performs better than the other three models under non-proportional loading. Meanwhile, it also verifies that the proposed enhancement factor can reflect the influence of phase difference and material properties on additional hardening.
关键词	Multiaxial fatigue damage critical plane method Miner rule phase difference additional hardening effect
DOI	10.1177/1687814020935331
收录类别	SCIE
语种	英语
WOS研究方向	Thermodynamics ; Engineering
WOS类目	Thermodynamics ; Engineering, Mechanical
WOS记录号	WOS:000544717600001
出版者	SAGE PUBLICATIONS LTD
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/155179
专题	材料科学与工程学院机电工程学院土木工程学院
通讯作者	Liu Jianhui
作者单位	1.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou, Peoples R China; 2.Lanzhou Univ Technol, Sch Mech & Elect Engn, 287 Langongping Rd, Lanzhou 730050, Gansu, Peoples R China; 3.Gansu Construct Vocat Tech Coll, Lanzhou, 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	Li Bin,Liu Jianhui,Wang Xiuli. A new multiaxial fatigue life prediction model considering additional hardening effect[J]. ADVANCES IN MECHANICAL ENGINEERING,2020,12(6).
APA	Li Bin,Liu Jianhui,&Wang Xiuli.(2020).A new multiaxial fatigue life prediction model considering additional hardening effect.ADVANCES IN MECHANICAL ENGINEERING,12(6).
MLA	Li Bin,et al."A new multiaxial fatigue life prediction model considering additional hardening effect".ADVANCES IN MECHANICAL ENGINEERING 12.6(2020).