New insight into the pit-to-crack transition from finite element analysis of the stress and strain distribution around a corrosion pit
New insight into the pit-to-crack transition from finite element analysis of the stress and strain distribution around a corrosion pit
复制标题
DOI：
10.1016/j.corsci.2009.12.004
复制
发表时间：
2010-04-01
影响因子：
8.3
通讯作者：
Crocker, L.
中科院分区：
文献类型：
--
作者：
Turnbull, A.;Wright, L.;Crocker, L.
已经进行了有限元（FE）分析，以评估与圆柱钢试样中与单个腐蚀坑相关的应力和应变分布，该钢铁标本在张力方面应远程胁迫。一个关键的观察结果是将塑性应变定位到坑壁（标本表面下方）。静态应力场中生长坑的模拟表明相应的塑性应变速率与应力腐蚀裂纹相称。该观察结果引入了一个全新的概念，以理解凹坑中应力腐蚀裂纹的演变，并与最近的X射线断层扫描测量值相关。 Crown版权所有（C）2009年由Elsevier Ltd.发布的所有权利保留。
A finite element (FE) analysis has been undertaken to evaluate the stress and strain distribution associated with a single corrosion pit in a cylindrical steel specimen stressed remotely in tension. A key observation was the localisation of plastic strain to the pit walls (just below the surface of the specimen). Simulation of a growing pit in a static stress field indicated corresponding plastic strain rates that were commensurate with values associated with stress corrosion cracking. This observation introduces a wholly new concept in understanding of the evolution of stress corrosion cracks from pits and correlates with recent X-ray tomography measurements. Crown Copyright (C) 2009 Published by Elsevier Ltd. All rights reserved.