Effect of pitting corrosion on the ultimate strength of steel plates subjected to in-plane compression and bending

被引:2
作者
Tatsuro Nakai
Hisao Matsushita
Norio Yamamoto
机构
[1] Nippon Kaiji Kyokai (ClassNK),Research Institute
来源
Journal of Marine Science and Technology | 2006年 / 11卷
关键词
Corrosion; Pitting corrosion; Hull structural members; Ultimate strength; Equivalent thickness;
D O I
暂无
中图分类号
学科分类号
摘要
Corrosion pits with a circular cone shape are typically observed on coated hold frames of aged bulk carriers which carry exclusively coal and iron ore. In order to ensure the safety of these types of bulk carrier, it is necessary to understand the effect of pitting corrosion on the local strength of hold frames. In order to investigate this effect, a series of nonlinear finite-element (FE) analyses has been performed with pitted plates subjected to in-plane compressive loads and bending moments. It has been shown that the ultimate compression load or bending moment of pitted plates is smaller than that of uniformly corroded plates in terms of average thickness loss, and that predictions of the ultimate strength using the average thickness loss at the minimum cross section would be conservative. In order to establish a method of evaluating strength reduction due to pitting corrosion, it is important to identify the failure mode that would be most detrimentally affected by pitting corrosion. It was found that the reduction of the ultimate compressive load or bending moment due to pitting corrosion is smaller than that of the tensile strength in terms of equivalent thickness.
引用
收藏
页码:52 / 64
页数:12
相关论文
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