An improved manson-halford model for multi-level nonlinear fatigue life prediction

被引：44

作者：

Gao, Kai ^{[1
]}

Liu, Gang ^{[1
,2
]}

Tang, Wei ^{[1
]}

机构：

[1] Chongqing Univ, Sch Civil Engn, Chongqing, Peoples R China

[2] Chongqing Univ, Key Lab New Technol Construct Cities Mt Area, Minist Educ, Chongqing, Peoples R China

来源：

INTERNATIONAL JOURNAL OF FATIGUE | 2021年 / 151卷

基金：

中国国家自然科学基金;

关键词：

Fatigue damage accumulation; Manson-Halford model; Load interaction effect; Load sequence effect; Life prediction; DAMAGE ACCUMULATION; RULE; CURVE;

D O I：

10.1016/j.ijfatigue.2021.106393

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The Manson-Halford (M-H) nonlinear fatigue damage model is widely used for fatigue damage analysis. It, however, does not consider the load interaction effect. This paper presents an improved M-H model with a load interaction factor defined as the ratio of the first and second stress levels. The characteristic exponent of the M-H model is modified by multiplying the load interaction factor and fatigue life ratio. The characteristic exponent can consider the load interaction effect and the load sequence effect under multi-level loading. Experimental data from five materials under two-level and multi-level stress loadings verify the accuracy of the proposed model.

引用

页数：12

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