The role of corrosion pit topography on stress concentration

被引：10

作者：

Dobson, Tamsin ^{[1
]}

Larrosa, Nicolas ^{[1
]}

Coules, Harry ^{[1
]}

机构：

[1] Univ Bristol, Solid Mech Res Grp, Bristol BS8 1TR, England

来源：

ENGINEERING FAILURE ANALYSIS | 2024年 / 157卷

基金：

英国工程与自然科学研究理事会;

关键词：

Mechanical engineering; Marine component; Nickel Aluminium Bronze; Finite elements analysis; Corrosion; Stress corrosion cracking; Preventative maintenance based on predictive; modelling; NICKEL-ALUMINUM BRONZE; FATIGUE CRACK INITIATION; PREDICTION; TRANSITION; EVOLUTION; STRENGTH;

D O I：

10.1016/j.engfailanal.2023.107900

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Smooth semi-ellipsoids are typically used to simulate the effect of corrosion pits on stress, however, this does not account for pit geometry. Three corrosion pits were identified on Nickel Aluminium Bronze samples. These were scanned and converted to finite element models. The linear elastic stress concentration factor (Kt) of the corrosion pit FE models was 1.32-1.65 times larger than for an equivalent smooth semi-ellipsoid. This suggests that detailed consideration of pit geometry is needed to calculate accurate values of Kt and the assumption of a semi-ellipsoidal pit may not be conservative for fatigue lifetime predictions of pitted components.

引用

页数：12

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