Fatigue crack propagation near a corrosion pit in a HSS specimen

被引：3

作者：

Malikova, Lucie ^{[1
,2
]}

Miarka, Petr ^{[1
,2
]}

机构：

[1] Czech Acad Sci, Vvi, Inst Phys Mat, Zizkova 513-22, Brno 61662, Czech Republic

[2] Brno Univ Technol, Fac Civil Engn, Inst Struct Mech, Veveri 331-95, Brno 60200, Czech Republic

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2024年 / 129卷

关键词：

Fatigue crack; High-strength steel; Corrosion pit; Finite element method; TIP ASYMPTOTIC FIELD; HIGH-STRENGTH; STEEL WIRES; STRESS-FIELD; T-STRESS; GROWTH; PERFORMANCE; COEFFICIENTS; BEHAVIOR; MODEL;

D O I：

10.1016/j.tafmec.2023.104214

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Corrosion and fatigue are very common forms of metal degradation, and thus an aspect of the complex issues involved is analysed within this work. A rectangular specimen with a surface fatigue crack and a surface corrosion pit subjected to remote tensile loading was modelled via the finite element method in order to assess the crack behaviour for various configurations of both the crack and the pit. A perpendicular crack was considered along with an angled crack, and the basic fracture parameters have been determined and discussed regarding the influence of the corrosion pit on further crack propagation. Additionally, selected fracture criteria have been applied in their classical one-parameter as well as generalised multi-parameter form to estimate the angle of further crack propagation. The results obtained are discussed thoroughly, and it is proved that the larger the corrosion pit, and the closer it is to the crack, the higher its effect on the fatigue crack behaviour is.

引用

页数：13

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