Fatigue life prediction model of metallic materials considering crack propagation and closure effect

被引：14

作者：

Wu, Que ^{[1
]}

Liu, Xintian ^{[1
]}

Liang, Zhiqiang ^{[1
]}

Wang, Yansong ^{[1
]}

Wang, Xiaolan ^{[1
]}

机构：

[1] Shanghai Univ Engn Sci, Sch Mech & Automot Engn, Shanghai 201620, Peoples R China

来源：

JOURNAL OF THE BRAZILIAN SOCIETY OF MECHANICAL SCIENCES AND ENGINEERING | 2020年 / 42卷 / 08期

基金：

中国国家自然科学基金;

关键词：

Energy increment; Metallic material; Crack closure effect; Fatigue life; ENERGY-BASED APPROACH; STRAIN-ENERGY; CYCLE FATIGUE; DISSIPATION; STEEL; ACCUMULATION; EXHAUSTION; INITIATION; SPECIMENS; TOUGHNESS;

D O I：

10.1007/s40430-020-02512-1

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

To consider the effect of crack closure on the mechanical properties of metals, the fatigue life of metal specimens is predicted based on energy dissipation model. The main feature of the model consists in considering the relationship between the total failure energy and the energy density increment. The total failure energy model considers the fatigue crack size and stress amplitude. It is assumed the energy density increment gradually decreases and tends to be stable. The influence of crack closure effect is considered. According to the law of metal fatigue characteristics, a new mathematical model for predicting fatigue life is established.

引用

页数：11

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