Numerical investigation on stress concentration of corrosion pit

被引：287

作者：

Cerit, M. ^{[1
]}

Genel, K. ^{[1
]}

Eksi, S. ^{[1
]}

机构：

[1] Sakarya Univ, Dept Mech Engn, TR-54187 Adapazari, Turkey

来源：

ENGINEERING FAILURE ANALYSIS | 2009年 / 16卷 / 07期

关键词：

Pitting corrosion; Stress concentrations; Finite element analysis; Fatigue crack; Structural failures; FATIGUE-CRACK INITIATION; ALUMINUM-ALLOY; BEHAVIOR;

D O I：

10.1016/j.engfailanal.2009.04.004

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Localized (pitting) corrosion has been observed in steel and high-strength aluminium alloys in aqueous environments and has been identified as a potential origin for fatigue crack nucleation. In the present study, under uniaxial tension loading, stress distribution at the semi-elliptical corrosion pits has been investigated by conducting a series of three-dimensional semi-elliptical pitted models, systematically. Based on the finite element analyses, it is concluded that pit aspect ratio (a/2c) is a main parameter affecting stress concentration factor (SCF). An attempt has been made to construct simple equations to SCIF depending on characteristic of pit parameters. At the bottom of hemispherical pit, contribution of secondary (premature) pit formation to SCF is very pronounced. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：2467 / 2472

页数：6

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