Numerical investigation on torsional stress concentration factor at the semi elliptical corrosion pit
Numerical investigation on torsional stress concentration factor at the semi elliptical corrosion pit
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DOI：
10.1016/j.corsci.2012.10.028
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发表时间：
2013-02-01
影响因子：
8.3
通讯作者：
Cerit, Muhammet
中科院分区：
文献类型：
--
作者：
Cerit, Muhammet
通过一系列三维凹坑研究了扭转作用下半椭圆形腐蚀坑的应力分布、半椭圆形基坑底部成核的次生坑以及半椭圆形主坑的方向。系统地预测应力集中因子的模型。根据有限元分析，长径比是影响SCF的主要参数。具有较高纵横比的凹坑是最危险的形式，会导致承载能力显着降低。当过早的凹坑在初级凹坑底部成核时，次生凹坑区域内的 SCF 急剧增加。 (C) 2012 Elsevier Ltd. 保留所有权利。
Under torsion, stress distribution at semi elliptical corrosion pits, secondary pit nucleated at the bottom of semi elliptical base pits and also orientation of the semi elliptical primary pits have been investigated by conducting a series of three-dimensional pits. models to predict stress concentration factor, systematically. Based on the finite element analyses, aspect ratio is the main parameter affecting SCF. Pits, having higher aspect ratio, are the most dangerous form and can cause significant reduction in the load carrying capacity. When a premature pit nucleates at the bottom of primary pit, SCF increases sharply within the secondary pit region. (C) 2012 Elsevier Ltd. All rights reserved.